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100 results found for "fractional-coefficients" in Class 10.

समीकरण \(\frac{3}{4}x^2-\frac{1}{2}x+2=0\) का पूर्णांक गुणांकों वाला रूप कौन-सा है?

What is the form with integer coefficients for \(\frac{3}{4}x^2-\frac{1}{2}x+2=0\)?

Explanation opens after your attempt
Correct Answer

A. \(3x^2-2x+8=0\)

Step 1

Concept

Multiply the whole equation by (4) to remove the denominators. This gives \(3x^2-2x+8=0\).

Step 2

Why this answer is correct

The correct answer is A. \(3x^2-2x+8=0\). Multiply the whole equation by (4) to remove the denominators. This gives \(3x^2-2x+8=0\).

Step 3

Exam Tip

हर हटाने के लिए पूरे समीकरण को (4) से गुणा करें। इससे \(3x^2-2x+8=0\) मिलता है।

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समीकरण \(\frac{2}{5}x^2+\frac{1}{5}x-2=0\) का पूर्णांक गुणांकों वाला रूप कौन-सा है?

What is the form with integer coefficients for \(\frac{2}{5}x^2+\frac{1}{5}x-2=0\)?

Explanation opens after your attempt
Correct Answer

A. \(2x^2+x-10=0\)

Step 1

Concept

Multiply the whole equation by (5) to remove denominator (5). This gives \(2x^2+x-10=0\).

Step 2

Why this answer is correct

The correct answer is A. \(2x^2+x-10=0\). Multiply the whole equation by (5) to remove denominator (5). This gives \(2x^2+x-10=0\).

Step 3

Exam Tip

हर (5) हटाने के लिए पूरे समीकरण को (5) से गुणा करें। इससे \(2x^2+x-10=0\) मिलता है।

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समीकरण \(\frac{1}{3}x^2-\frac{2}{3}x+1=0\) का पूर्णांक गुणांकों वाला रूप कौन-सा है?

What is the form with integer coefficients for \(\frac{1}{3}x^2-\frac{2}{3}x+1=0\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x+3=0\)

Step 1

Concept

Multiply the whole equation by (3) to remove the denominator (3). This gives \(x^2-2x+3=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x+3=0\). Multiply the whole equation by (3) to remove the denominator (3). This gives \(x^2-2x+3=0\).

Step 3

Exam Tip

हर (3) हटाने के लिए पूरे समीकरण को (3) से गुणा करें। इससे \(x^2-2x+3=0\) मिलता है।

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यदि किसी परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(\frac{3+\sqrt{5}}{2}\) है, तो दूसरा शून्यक क्या होगा?

If one zero of a quadratic polynomial with rational coefficients is \(\frac{3+\sqrt{5}}{2}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3-\sqrt{5}}{2}\)

Step 1

Concept

With rational coefficients, the conjugate of the irrational part is also a zero. Hence \(\frac{3-\sqrt{5}}{2}\) is the other zero.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{3-\sqrt{5}}{2}\). With rational coefficients, the conjugate of the irrational part is also a zero. Hence \(\frac{3-\sqrt{5}}{2}\) is the other zero.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय भाग का संयुग्मी भी शून्यक होता है। इसलिए \(\frac{3-\sqrt{5}}{2}\) दूसरा शून्यक है।

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कौन सा व्यंजक बहुपद नहीं है क्योंकि चर की घात भिन्न है?

Which expression is not a polynomial because the variable has a fractional power?

Explanation opens after your attempt
Correct Answer

C. \(x^{\frac{3}{2}}+x+1\)

Step 1

Concept

In \(x^{\frac{3}{2}}\), the power of the variable is fractional, so it is not a polynomial. In a polynomial, powers are non-negative integers.

Step 2

Why this answer is correct

The correct answer is C. \(x^{\frac{3}{2}}+x+1\). In \(x^{\frac{3}{2}}\), the power of the variable is fractional, so it is not a polynomial. In a polynomial, powers are non-negative integers.

Step 3

Exam Tip

\(x^{\frac{3}{2}}\) में चर की घात भिन्न है, इसलिए यह बहुपद नहीं है। बहुपद में घातें अऋणात्मक पूर्णांक होती हैं।

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(p(x)=6x-6-5x-5+4x-3-2x-2+x-7) में विषम घात वाले पदों के गुणांकों का योग क्या है?

What is the sum of coefficients of odd-power terms in (p(x)=6x-6-5x-5+4x-3-2x-2+x-7)?

Explanation opens after your attempt
Correct Answer

B. (0)

Step 1

Concept

The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (-5), (4), and (1). Their sum is (0).

Step 2

Why this answer is correct

The correct answer is B. (0). The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (-5), (4), and (1). Their sum is (0).

Step 3

Exam Tip

विषम घातों \(x^5\), \(x^3\) और (x) के गुणांक (-5), (4) और (1) हैं। उनका योग (0) है।

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यदि (p(x)=4x-4+kx-3-6x+1) में सभी गुणांकों का योग (5) है, तो (k) क्या है?

If the sum of all coefficients of (p(x)=4x-4+kx-3-6x+1) is (5), what is (k)?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

The sum of coefficients is (4+k+0-6+1=k-1), so (k-1=5) and (k=6). The sum of coefficients is found by (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (6). The sum of coefficients is (4+k+0-6+1=k-1), so (k-1=5) and (k=6). The sum of coefficients is found by (p(1)).

Step 3

Exam Tip

गुणांकों का योग (4+k+0-6+1=k-1) है, इसलिए (k-1=5) और (k=6)। गुणांकों का योग (p(1)) से मिलता है।

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(p(x)=8x-4-3x-3-4x+2) में सभी गुणांकों का योग क्या है?

What is the sum of all coefficients in (p(x)=8x-4-3x-3-4x+2)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The sum of all coefficients is (8-3+0-4+2=3). It is also equal to (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (3). The sum of all coefficients is (8-3+0-4+2=3). It is also equal to (p(1)).

Step 3

Exam Tip

सभी गुणांकों का योग (8-3+0-4+2=3) है। यह (p(1)) के बराबर भी होता है।

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(p(x)=5x-5-3x-4+2x-3-x+6) में विषम घात वाले पदों के गुणांकों का योग क्या है?

What is the sum of coefficients of odd-power terms in (p(x)=5x-5-3x-4+2x-3-x+6)?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (5), (2), and (-1). Their sum is (6).

Step 2

Why this answer is correct

The correct answer is C. (6). The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (5), (2), and (-1). Their sum is (6).

Step 3

Exam Tip

विषम घातों \(x^5\), \(x^3\) और (x) के गुणांक (5), (2) और (-1) हैं। उनका योग (6) है।

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यदि बहुपद (p(x)=3x-3+kx-2-7x+2) में सभी गुणांकों का योग (5) है, तो (k) क्या है?

If the sum of all coefficients of (p(x)=3x-3+kx-2-7x+2) is (5), what is (k)?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

The sum of coefficients is (3+k-7+2=k-2), so (k-2=5) and (k=7). The sum of coefficients is (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (7). The sum of coefficients is (3+k-7+2=k-2), so (k-2=5) and (k=7). The sum of coefficients is (p(1)).

Step 3

Exam Tip

गुणांकों का योग (3+k-7+2=k-2) है, इसलिए (k-2=5) और (k=7)। गुणांकों का योग (p(1)) होता है।

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(p(x)=7x-3-4x-2-2x-1) में सभी गुणांकों का योग क्या है?

What is the sum of all coefficients in (p(x)=7x-3-4x-2-2x-1)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

The sum of all coefficients is (7-4-2-1=0). It is also equal to (p(1)).

Step 2

Why this answer is correct

The correct answer is A. (0). The sum of all coefficients is (7-4-2-1=0). It is also equal to (p(1)).

Step 3

Exam Tip

सभी गुणांकों का योग (7-4-2-1=0) है। यह (p(1)) के बराबर भी होता है।

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(p(x)=3x-4-5x-2+2x-7) में विषम घात वाले पदों के गुणांकों का योग क्या है?

What is the sum of coefficients of the odd-power terms in (p(x)=3x-4-5x-2+2x-7)?

Explanation opens after your attempt
Correct Answer

C. (2)

Step 1

Concept

The only odd-power term is (2x), so the sum is (2). Do not treat \(x^0\) as an odd power.

Step 2

Why this answer is correct

The correct answer is C. (2). The only odd-power term is (2x), so the sum is (2). Do not treat \(x^0\) as an odd power.

Step 3

Exam Tip

विषम घात वाला केवल (2x) पद है, इसलिए योग (2) है। \(x^0\) को विषम घात न मानें।

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यदि बहुपद (p(x)=2x-3+kx-2-8x+3) में सभी गुणांकों का योग (0) है, तो (k) क्या है?

If the sum of all coefficients of (p(x)=2x-3+kx-2-8x+3) is (0), what is (k)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The sum of coefficients is (2+k-8+3=k-3), so (k=3). The sum of coefficients can also be found by (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (3). The sum of coefficients is (2+k-8+3=k-3), so (k=3). The sum of coefficients can also be found by (p(1)).

Step 3

Exam Tip

गुणांकों का योग (2+k-8+3=k-3) है, इसलिए (k=3)। गुणांकों का योग (p(1)) से भी मिलता है।

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(p(x)=5x-3-2x-2+x-4) में सभी गुणांकों का योग क्या है?

What is the sum of all coefficients in (p(x)=5x-3-2x-2+x-4)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

The sum of all coefficients is (5-2+1-4=0). It is also equal to (p(1)).

Step 2

Why this answer is correct

The correct answer is A. (0). The sum of all coefficients is (5-2+1-4=0). It is also equal to (p(1)).

Step 3

Exam Tip

सभी गुणांकों का योग (5-2+1-4=0) है। यह (p(1)) के बराबर भी होता है।

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\(5x^2-6x+2\) और \(2x^2+9x-1\) में (x) के गुणांकों का योग क्या है?

What is the sum of the coefficients of (x) in \(5x^2-6x+2\) and \(2x^2+9x-1\)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The coefficient of (x) is (-6) in the first polynomial and (9) in the second, so the sum is (3). Add coefficients of like powers only.

Step 2

Why this answer is correct

The correct answer is C. (3). The coefficient of (x) is (-6) in the first polynomial and (9) in the second, so the sum is (3). Add coefficients of like powers only.

Step 3

Exam Tip

पहले बहुपद में (x) का गुणांक (-6) और दूसरे में (9) है, योग (3) है। समान घात के गुणांक ही जोड़ें।

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\(3x^2-2x+1\) और \(x^2+4x+7\) में (x) के गुणांकों का योग क्या है?

What is the sum of the coefficients of (x) in \(3x^2-2x+1\) and \(x^2+4x+7\)?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

The coefficient of (x) is (-2) in the first polynomial and (4) in the second, so the sum is (2). Add coefficients of like powers only.

Step 2

Why this answer is correct

The correct answer is A. (2). The coefficient of (x) is (-2) in the first polynomial and (4) in the second, so the sum is (2). Add coefficients of like powers only.

Step 3

Exam Tip

पहले बहुपद में (x) का गुणांक (-2) और दूसरे में (4) है, योग (2) है। समान घात के गुणांक ही जोड़ें।

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बहुपद (p(x)=3x-2+4x+5) में कुल कितने गुणांक हैं जब इसे \(ax^2+bx+c\) रूप में देखें?

How many coefficients are there in (p(x)=3x-2+4x+5) when viewed as \(ax^2+bx+c\)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

In \(ax^2+bx+c\), there are three coefficients (a), (b), and (c). Here they are (3), (4), and (5).

Step 2

Why this answer is correct

The correct answer is C. (3). In \(ax^2+bx+c\), there are three coefficients (a), (b), and (c). Here they are (3), (4), and (5).

Step 3

Exam Tip

\(ax^2+bx+c\) में (a), (b) और (c) तीन गुणांक होते हैं। यहाँ वे (3), (4) और (5) हैं।

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किस विकल्प में परिमेय गुणांकों वाला द्विघात बहुपद बन सकता है?

Which option can form a quadratic polynomial with rational coefficients?

Explanation opens after your attempt
Correct Answer

A. शून्यक \(6+\sqrt{5}\) और \(6-\sqrt{5}\)Zeroes \(6+\sqrt{5}\) and \(6-\sqrt{5}\)

Step 1

Concept

With rational coefficients, irrational parts occur in conjugate pairs. Only \(6+\sqrt{5}\) and \(6-\sqrt{5}\) have both rational sum and rational product.

Step 2

Why this answer is correct

The correct answer is A. शून्यक \(6+\sqrt{5}\) और \(6-\sqrt{5}\) / Zeroes \(6+\sqrt{5}\) and \(6-\sqrt{5}\). With rational coefficients, irrational parts occur in conjugate pairs. Only \(6+\sqrt{5}\) and \(6-\sqrt{5}\) have both rational sum and rational product.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय भाग संयुग्मी जोड़े में आता है। केवल \(6+\sqrt{5}\) और \(6-\sqrt{5}\) का योग और गुणनफल दोनों परिमेय हैं।

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यदि \(2+\sqrt{13}\) परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक है, तो उस बहुपद में (x) का गुणांक किस रूप में हो सकता है?

If \(2+\sqrt{13}\) is one zero of a quadratic polynomial with rational coefficients, what can the coefficient of (x) be?

Explanation opens after your attempt
Correct Answer

A. (-4)

Step 1

Concept

The other zero will be \(2-\sqrt{13}\), so the sum is (4). In a monic polynomial, the coefficient of (x) will be (-4).

Step 2

Why this answer is correct

The correct answer is A. (-4). The other zero will be \(2-\sqrt{13}\), so the sum is (4). In a monic polynomial, the coefficient of (x) will be (-4).

Step 3

Exam Tip

दूसरा शून्यक \(2-\sqrt{13}\) होगा, इसलिए योग (4) है। एकक बहुपद में (x) का गुणांक (-4) होगा।

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यदि (p(x)=x-2-3x-\sqrt{2}) है, तो (p(x)) के गुणांकों के बारे में सही कथन कौन सा है?

If (p(x)=x-2-3x-\sqrt{2}), which statement about the coefficients of (p(x)) is correct?

Explanation opens after your attempt
Correct Answer

B. एक गुणांक अपरिमेय हैOne coefficient is irrational

Step 1

Concept

The constant term \(-\sqrt{2}\) is irrational, while the other coefficients are rational. Check coefficient type before applying root rules.

Step 2

Why this answer is correct

The correct answer is B. एक गुणांक अपरिमेय है / One coefficient is irrational. The constant term \(-\sqrt{2}\) is irrational, while the other coefficients are rational. Check coefficient type before applying root rules.

Step 3

Exam Tip

स्थिर पद \(-\sqrt{2}\) अपरिमेय है, जबकि बाकी गुणांक परिमेय हैं। शून्यक नियम लागू करने से पहले गुणांकों का प्रकार देखें।

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कौन सा कथन हमेशा सही है यदि द्विघात बहुपद के परिमेय गुणांक और एक शून्यक \(\sqrt{13}\) है?

Which statement is always true if a quadratic polynomial has rational coefficients and one zero is \(\sqrt{13}\)?

Explanation opens after your attempt
Correct Answer

A. दूसरा शून्यक \(-\sqrt{13}\) होगाThe other zero will be \(-\sqrt{13}\)

Step 1

Concept

For rational coefficients, the conjugate \(-\sqrt{13}\) of \(\sqrt{13}\) also appears when the linear coefficient is rational. This follows from \(a+\sqrt{b}\) and \(a-\sqrt{b}\).

Step 2

Why this answer is correct

The correct answer is A. दूसरा शून्यक \(-\sqrt{13}\) होगा / The other zero will be \(-\sqrt{13}\). For rational coefficients, the conjugate \(-\sqrt{13}\) of \(\sqrt{13}\) also appears when the linear coefficient is rational. This follows from \(a+\sqrt{b}\) and \(a-\sqrt{b}\).

Step 3

Exam Tip

परिमेय गुणांकों के लिए \(\sqrt{13}\) का संयुग्मी \(-\sqrt{13}\) भी आता है, जब रैखिक गुणांक परिमेय हो। यह नियम \(a+\sqrt{b}\) और \(a-\sqrt{b}\) पर आधारित है।

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यदि \(\sqrt{2}\) और \(\sqrt{3}\) किसी द्विघात बहुपद के शून्यक हैं, तो उस बहुपद के गुणांक किस प्रकार होंगे?

If \(\sqrt{2}\) and \(\sqrt{3}\) are zeroes of a quadratic polynomial, what type of coefficients will that polynomial have?

Explanation opens after your attempt
Correct Answer

B. कम से कम एक गुणांक अपरिमेय होगाAt least one coefficient will be irrational

Step 1

Concept

The sum \(\sqrt{2}+\sqrt{3}\) is irrational, so the coefficient of (x) in the monic polynomial is irrational. For rational coefficients, such zeroes must occur as conjugates.

Step 2

Why this answer is correct

The correct answer is B. कम से कम एक गुणांक अपरिमेय होगा / At least one coefficient will be irrational. The sum \(\sqrt{2}+\sqrt{3}\) is irrational, so the coefficient of (x) in the monic polynomial is irrational. For rational coefficients, such zeroes must occur as conjugates.

Step 3

Exam Tip

योग \(\sqrt{2}+\sqrt{3}\) अपरिमेय है, इसलिए एकक बहुपद में (x) का गुणांक अपरिमेय होगा। परिमेय गुणांक के लिए ऐसे शून्यक संयुग्मी रूप में होने चाहिए।

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कौन सा युग्म परिमेय गुणांकों वाले किसी द्विघात बहुपद के अपरिमेय शून्यकों का संभव युग्म है?

Which pair can be irrational zeroes of a quadratic polynomial with rational coefficients?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\)\(4+\sqrt{6}\) and \(4-\sqrt{6}\)

Step 1

Concept

For rational coefficients, the conjugate \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Hence the first pair is correct.

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\) / \(4+\sqrt{6}\) and \(4-\sqrt{6}\). For rational coefficients, the conjugate \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Hence the first pair is correct.

Step 3

Exam Tip

परिमेय गुणांकों के लिए \(a+\sqrt{b}\) का संयुग्मी \(a-\sqrt{b}\) साथ आता है। इसलिए पहला युग्म सही है।

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किस विकल्प में दिया बहुपद परिमेय गुणांकों वाला है और उसके शून्यक अपरिमेय संयुग्मी हैं?

Which option gives a polynomial with rational coefficients and irrational conjugate zeroes?

Explanation opens after your attempt
Correct Answer

A. \(x^2-6x+7\)

Step 1

Concept

For \(x^2-6x+7\), (D=36-28=8). The coefficients are rational and the zeroes are \(3\pm\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-6x+7\). For \(x^2-6x+7\), (D=36-28=8). The coefficients are rational and the zeroes are \(3\pm\sqrt{2}\).

Step 3

Exam Tip

\(x^2-6x+7\) में (D=36-28=8) है। गुणांक परिमेय हैं और शून्यक \(3\pm\sqrt{2}\) होंगे।

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यदि किसी द्विघात बहुपद के परिमेय गुणांक हैं और शून्यक \(4+\sqrt{11}\) है, तो शून्यकों का योग क्या होगा?

If a quadratic polynomial has rational coefficients and one zero is \(4+\sqrt{11}\), what will be the sum of its zeroes?

Explanation opens after your attempt
Correct Answer

A. (8)

Step 1

Concept

The other zero will be \(4-\sqrt{11}\). The sum is (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8).

Step 2

Why this answer is correct

The correct answer is A. (8). The other zero will be \(4-\sqrt{11}\). The sum is (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8).

Step 3

Exam Tip

दूसरा शून्यक \(4-\sqrt{11}\) होगा। योग (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8) है।

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संतुलन करते समय गुणांक बदलना छोटे अंक बदलने से सुरक्षित क्यों है?

Why is changing coefficients safer than changing subscripts during balancing?

Explanation opens after your attempt
Correct Answer

A. गुणांक कणों की संख्या बदलते हैं पदार्थ की पहचान नहींCoefficients change number of particles not identity

Step 1

Concept

Subscripts show the composition of a substance.

Step 2

Why this answer is correct

Changing them changes the substance.

Step 3

Exam Tip

Changing coefficients changes only the number of particles. चरण 1: छोटे अंक पदार्थ की रचना बताते हैं। चरण 2: उन्हें बदलने से पदार्थ बदल जाता है। चरण 3: गुणांक बदलने से केवल संख्या बदलती है।

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संतुलित समीकरण बनाने में गुणांक बदलना छोटे अंक बदलने से बेहतर क्यों है?

Why is changing coefficients better than changing subscripts while making a balanced equation?

Explanation opens after your attempt
Correct Answer

A. गुणांक पदार्थ की मात्रा बदलते हैं पहचान नहींCoefficients change amount not identity

Step 1

Concept

Subscripts show the composition of a substance.

Step 2

Why this answer is correct

Coefficients show only the number of molecules or units.

Step 3

Exam Tip

Therefore changing coefficients is the correct method for balancing. चरण 1: छोटे अंक पदार्थ की रचना बताते हैं। चरण 2: गुणांक केवल अणुओं या कणों की संख्या बताते हैं। चरण 3: इसलिए संतुलन में गुणांक बदलना सही विधि है।

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समीकरण संतुलित करते समय रासायनिक सूत्रों के बजाय गुणांक क्यों बदले जाते हैं?

Why are coefficients changed instead of chemical formulae while balancing equations?

Explanation opens after your attempt
Correct Answer

A. क्योंकि सूत्र बदलने से पदार्थ बदल जाता हैBecause changing formulae changes the substance

Step 1

Concept

Chemical formulae show the correct composition of substances.

Step 2

Why this answer is correct

Changing a formula changes the identity of the substance.

Step 3

Exam Tip

Changing only coefficients is the correct way to balance. चरण 1: रासायनिक सूत्र पदार्थ की सही संरचना बताते हैं। चरण 2: सूत्र बदलने से पदार्थ की पहचान बदल जाती है। चरण 3: संतुलन के लिए केवल गुणांक बदलना सही तरीका है।

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समीकरण संतुलित करते समय गुणांक कहाँ लगाए जाते हैं?

Where are coefficients placed while balancing an equation?

Explanation opens after your attempt
Correct Answer

A. रासायनिक सूत्रों के आगेBefore chemical formulae

Step 1

Concept

Formulae are not changed for balancing.

Step 2

Why this answer is correct

Coefficients are placed before formulae.

Step 3

Exam Tip

They show the number of molecules or units. चरण 1: संतुलन के लिए सूत्र नहीं बदले जाते। चरण 2: सूत्रों के आगे गुणांक लगाए जाते हैं। चरण 3: गुणांक अणुओं या इकाइयों की संख्या बताते हैं।

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रासायनिक समीकरण में गुणांक किस काम आते हैं?

What is the use of coefficients in a chemical equation?

Explanation opens after your attempt
Correct Answer

A. परमाणुओं की संख्या संतुलित करने मेंTo balance the number of atoms

Step 1

Concept

Coefficients are written before chemical formulae.

Step 2

Why this answer is correct

They show the number of molecules or units.

Step 3

Exam Tip

During balancing coefficients are changed not formulae. चरण 1: गुणांक रासायनिक सूत्रों के आगे लिखे जाते हैं। चरण 2: ये अणुओं या इकाइयों की संख्या बताते हैं। चरण 3: समीकरण संतुलित करने में गुणांक बदले जाते हैं सूत्र नहीं।

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संख्या रेखा पर ( -0.3125 ) का सरल भिन्न रूप कौन सा है?

What is the simplest fractional form of ( -0.3125 ) on the number line?

Explanation opens after your attempt
Correct Answer

A. \( -\frac{5}{16} \)

Step 1

Concept

\( -0.3125=-\frac{3125}{10000}=-\frac{5}{16} \). Convert the decimal into a fraction and simplify.

Step 2

Why this answer is correct

The correct answer is A. \( -\frac{5}{16} \). \( -0.3125=-\frac{3125}{10000}=-\frac{5}{16} \). Convert the decimal into a fraction and simplify.

Step 3

Exam Tip

\( -0.3125=-\frac{3125}{10000}=-\frac{5}{16} \)। दशमलव को भिन्न में बदलकर सरल करें।

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यदि (r=0.375), तो संख्या रेखा पर (r) का सरल भिन्न रूप कौन सा है?

If (r=0.375), what is the simplest fractional form of (r) on the number line?

Explanation opens after your attempt
Correct Answer

A. \( \frac{3}{8} \)

Step 1

Concept

\(0.375=\frac{375}{1000}=\frac{3}{8}\). Convert the decimal into a fraction and simplify.

Step 2

Why this answer is correct

The correct answer is A. \( \frac{3}{8} \). \(0.375=\frac{375}{1000}=\frac{3}{8}\). Convert the decimal into a fraction and simplify.

Step 3

Exam Tip

\(0.375=\frac{375}{1000}=\frac{3}{8}\)। दशमलव को भिन्न में बदलकर सरल करें।

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संख्या रेखा पर ( -0.625 ) का भिन्न रूप कौन सा है?

What is the fractional form of ( -0.625 ) on the number line?

Explanation opens after your attempt
Correct Answer

A. \( -\frac{5}{8}\)

Step 1

Concept

\( -0.625=-\frac{625}{1000}=-\frac{5}{8}\). First convert the decimal to a fraction, then simplify.

Step 2

Why this answer is correct

The correct answer is A. \( -\frac{5}{8}\). \( -0.625=-\frac{625}{1000}=-\frac{5}{8}\). First convert the decimal to a fraction, then simplify.

Step 3

Exam Tip

\( -0.625=-\frac{625}{1000}=-\frac{5}{8}\)। पहले दशमलव को भिन्न में बदलें, फिर सरल करें।

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यदि (r) संख्या रेखा पर (0.125) पर है, तो (r) का भिन्न रूप कौन सा है?

If (r) is at (0.125) on the number line, what is the fractional form of (r)?

Explanation opens after your attempt
Correct Answer

A. \( \frac{1}{8}\)

Step 1

Concept

\(0.125=\frac{125}{1000}=\frac{1}{8}\). Convert the decimal to a fraction and simplify.

Step 2

Why this answer is correct

The correct answer is A. \( \frac{1}{8}\). \(0.125=\frac{125}{1000}=\frac{1}{8}\). Convert the decimal to a fraction and simplify.

Step 3

Exam Tip

\(0.125=\frac{125}{1000}=\frac{1}{8}\)। दशमलव को भिन्न में बदलकर सरल करें।

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यदि (x) संख्या रेखा पर (1.25) है, तो (x) का भिन्न रूप कौन-सा है?

If (x) is (1.25) on the number line, which fractional form represents (x)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{5}{4}\)

Step 1

Concept

\(1.25=\frac{125}{100}=\frac{5}{4}\). Convert terminating decimals using denominator \(10^n\).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{5}{4}\). \(1.25=\frac{125}{100}=\frac{5}{4}\). Convert terminating decimals using denominator \(10^n\).

Step 3

Exam Tip

\(1.25=\frac{125}{100}=\frac{5}{4}\)। सांत दशमलव को हर \(10^n\) से भिन्न में बदलें।

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संख्या रेखा पर (1.25) को भिन्न में लिखकर कौन-सा बिंदु दर्शाएगा?

Which fractional point represents (1.25) on the number line?

Explanation opens after your attempt
Correct Answer

A. \(\frac{5}{4}\)

Step 1

Concept

\(1.25=\frac{125}{100}=\frac{5}{4}\). Converting a decimal to a simple fraction helps locate it quickly.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{5}{4}\). \(1.25=\frac{125}{100}=\frac{5}{4}\). Converting a decimal to a simple fraction helps locate it quickly.

Step 3

Exam Tip

\(1.25=\frac{125}{100}=\frac{5}{4}\) है। दशमलव को सरल भिन्न में बदलकर स्थिति जल्दी मिलती है।

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\(0.1\overline{6}\) का भिन्न रूप कौन-सा है?

Which is the fractional form of \(0.1\overline{6}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{6}\)

Step 1

Concept

\(0.1\overline{6}=0.1666\ldots\).

Step 2

Why this answer is correct

This is equal to \(\frac{1}{6}\).

Step 3

Exam Tip

In a mixed recurring decimal, identify the non-repeating part and then the repeating part. चरण 1: \(0.1\overline{6}=0.1666\ldots\) है। चरण 2: यह प्रसिद्ध रूप से \(\frac{1}{6}\) के बराबर है। चरण 3: मिश्रित आवर्ती दशमलव में पहले गैर-आवर्ती भाग और फिर दोहराने वाला भाग पहचानें।

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\(0.\overline{45}\) का सरलतम भिन्न रूप कौन-सा है?

Which is the simplest fractional form of \(0.\overline{45}\)?

Explanation opens after your attempt
Correct Answer

C. \(\frac{5}{11}\)

Step 1

Concept

The repeating block is (45), so \(0.\overline{45}=\frac{45}{99}\).

Step 2

Why this answer is correct

\(\frac{45}{99}=\frac{5}{11}\).

Step 3

Exam Tip

Write as many (9)s in the denominator as the number of repeating digits. चरण 1: दोहराने वाला भाग (45) है, इसलिए \(0.\overline{45}=\frac{45}{99}\) है। चरण 2: \(\frac{45}{99}=\frac{5}{11}\) है। चरण 3: आवर्ती भाग के अंकों की संख्या के बराबर (9) हर में लिखें।

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(0.875) का सरलतम भिन्न रूप क्या है?

What is the simplest fractional form of (0.875)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{7}{8}\)

Step 1

Concept

\(0.875=\frac{875}{1000}\).

Step 2

Why this answer is correct

Reducing gives \(\frac{875}{1000}=\frac{7}{8}\).

Step 3

Exam Tip

Count the decimal places and use the corresponding power of (10) as denominator. चरण 1: \(0.875=\frac{875}{1000}\) है। चरण 2: सरल करने पर \(\frac{875}{1000}=\frac{7}{8}\) मिलता है। चरण 3: समाप्त दशमलव में दशमलव स्थान गिनकर (10) की घात वाला हर लिखें।

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\(0.\overline{18}\) को भिन्न में बदलने पर सरलतम रूप क्या होगा?

What is the simplest fractional form of \(0.\overline{18}\)?

Explanation opens after your attempt
Correct Answer

C. \(\frac{2}{11}\)

Step 1

Concept

The repeating block is (18), so \(0.\overline{18}=\frac{18}{99}\).

Step 2

Why this answer is correct

\(\frac{18}{99}=\frac{2}{11}\).

Step 3

Exam Tip

The number of (9)s in the denominator equals the number of repeating digits. चरण 1: दोहराने वाला भाग (18) है, इसलिए \(0.\overline{18}=\frac{18}{99}\) होगा। चरण 2: \(\frac{18}{99}=\frac{2}{11}\) है। चरण 3: जितने अंक दोहरते हैं, हर में उतने ही (9) लिखे जाते हैं।

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\(0.2\overline{3}\) को भिन्न में बदलने पर सही रूप कौन-सा है?

Which is the correct fractional form of \(0.2\overline{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{7}{30}\)

Step 1

Concept

\(0.2\overline{3}=0.2333\ldots\).

Step 2

Why this answer is correct

Converting it gives \(\frac{7}{30}\).

Step 3

Exam Tip

For a mixed recurring decimal, separate the non-repeating and repeating parts carefully. चरण 1: \(0.2\overline{3}=0.2333\ldots\) है। चरण 2: इसे सरल करने पर \(\frac{7}{30}\) मिलता है। चरण 3: मिश्रित आवर्ती दशमलव में गैर-आवर्ती और आवर्ती भाग अलग-अलग पहचानें।

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\(0.\overline{27}\) का सरलतम भिन्न रूप कौन-सा है?

Which is the simplest fractional form of \(0.\overline{27}\)?

Explanation opens after your attempt
Correct Answer

C. \(\frac{3}{11}\)

Step 1

Concept

The repeating block is (27), so \(0.\overline{27}=\frac{27}{99}\).

Step 2

Why this answer is correct

\(\frac{27}{99}=\frac{3}{11}\).

Step 3

Exam Tip

For recurring decimals, the number of (9)s matches the repeating digits. चरण 1: दो अंकों का आवर्ती भाग (27) है, इसलिए \(0.\overline{27}=\frac{27}{99}\) होगा। चरण 2: \(\frac{27}{99}=\frac{3}{11}\) है। चरण 3: आवर्ती दशमलव में दोहरते अंकों के लिए उतने ही (9) हर में आते हैं।

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(0.125) का सरलतम भिन्न रूप क्या है?

What is the simplest fractional form of (0.125)?

Explanation opens after your attempt
Correct Answer

B. \(\frac{1}{8}\)

Step 1

Concept

\(0.125=\frac{125}{1000}\).

Step 2

Why this answer is correct

Reducing gives \(\frac{125}{1000}=\frac{1}{8}\).

Step 3

Exam Tip

Write a terminating decimal first with denominator (10), (100), or (1000), then reduce. चरण 1: \(0.125=\frac{125}{1000}\) है। चरण 2: सरल करने पर \(\frac{125}{1000}=\frac{1}{8}\) मिलता है। चरण 3: समाप्त दशमलव को पहले (10), (100), (1000) जैसे हर में लिखें।

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दशमलव (0.0008) का सरल भिन्न रूप क्या है?

What is the simplest fractional form of (0.0008)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{1250}\)

Step 1

Concept

\(0.0008=\frac{8}{10000}\).

Step 2

Why this answer is correct

Reducing by (8) gives \(\frac{1}{1250}\).

Step 3

Exam Tip

Count decimal places carefully in very small decimals. चरण 1: \(0.0008=\frac{8}{10000}\) है। चरण 2: (8) से काटने पर \(\frac{1}{1250}\) मिलता है। चरण 3: बहुत छोटे दशमलवों में दशमलव स्थान ध्यान से गिनें।

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दशमलव (2.04) का सरल भिन्न रूप कौन-सा है?

What is the simplest fractional form of (2.04)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{51}{25}\)

Step 1

Concept

\(2.04=\frac{204}{100}\).

Step 2

Why this answer is correct

Reducing by (4) gives \(\frac{51}{25}\).

Step 3

Exam Tip

When converting a decimal to a fraction, include the whole part in the numerator. चरण 1: \(2.04=\frac{204}{100}\) है। चरण 2: (4) से काटने पर \(\frac{51}{25}\) मिलता है। चरण 3: दशमलव को भिन्न बनाते समय पूर्ण भाग सहित पूरी संख्या लिखें।

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दशमलव (1.25) का सरल भिन्न रूप कौन-सा है?

What is the simplest fractional form of (1.25)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{5}{4}\)

Step 1

Concept

\(1.25=\frac{125}{100}\).

Step 2

Why this answer is correct

Reducing by (25) gives \(\frac{5}{4}\).

Step 3

Exam Tip

A terminating decimal greater than (1) can also be converted into a rational fraction. चरण 1: \(1.25=\frac{125}{100}\) है। चरण 2: (25) से काटने पर \(\frac{5}{4}\) मिलता है। चरण 3: (1) से बड़ी समाप्त दशमलव संख्या भी परिमेय भिन्न में बदलती है।

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दशमलव (0.375) का सरल भिन्न रूप कौन-सा है?

What is the simplest fractional form of (0.375)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3}{8}\)

Step 1

Concept

\(0.375=\frac{375}{1000}\).

Step 2

Why this answer is correct

Reducing by (125) gives \(\frac{3}{8}\).

Step 3

Exam Tip

For three decimal places, first use denominator (1000) and then reduce. चरण 1: \(0.375=\frac{375}{1000}\) है। चरण 2: (125) से काटने पर \(\frac{3}{8}\) मिलता है। चरण 3: तीन दशमलव स्थान हों तो पहले (1000) भाजक लेकर सरल करें।

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दशमलव (0.0005) का सरल भिन्न रूप कौन-सा है?

What is the simplest fractional form of (0.0005)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{2000}\)

Step 1

Concept

\(0.0005=\frac{5}{10000}\).

Step 2

Why this answer is correct

Dividing by (5) gives \(\frac{1}{2000}\).

Step 3

Exam Tip

Count zeros carefully in very small terminating decimals. चरण 1: \(0.0005=\frac{5}{10000}\) है। चरण 2: (5) से काटने पर \(\frac{1}{2000}\) मिलता है। चरण 3: छोटे दशमलवों में शून्यों की गिनती ध्यान से करें।

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दशमलव (0.04) का सरल भिन्न रूप क्या है?

What is the simplest fractional form of (0.04)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{25}\)

Step 1

Concept

\(0.04=\frac{4}{100}\).

Step 2

Why this answer is correct

Dividing by (4) gives \(\frac{1}{25}\).

Step 3

Exam Tip

In decimals with zeros, counting decimal places is very important. चरण 1: \(0.04=\frac{4}{100}\) है। चरण 2: (4) से काटने पर \(\frac{1}{25}\) मिलता है। चरण 3: शून्य वाले दशमलवों में दशमलव स्थान गिनना बहुत जरूरी है।

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दशमलव (0.6) का सरल भिन्न रूप कौन-सा है?

What is the simplest fractional form of (0.6)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3}{5}\)

Step 1

Concept

\(0.6=\frac{6}{10}\).

Step 2

Why this answer is correct

Reducing \(\frac{6}{10}\) by (2) gives \(\frac{3}{5}\).

Step 3

Exam Tip

After converting a decimal to a fraction, always reduce it. चरण 1: \(0.6=\frac{6}{10}\) है। चरण 2: \(\frac{6}{10}\) को (2) से काटने पर \(\frac{3}{5}\) मिलता है। चरण 3: दशमलव से भिन्न बनाकर अंत में सरल करना न भूलें।

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कौन-सा व्यंजक एक चर वाला बहुपद है जिसमें वास्तविक गुणांक हैं?

Which expression is a polynomial in one variable with real coefficients?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}x^2-3x+1\)

Step 1

Concept

\(\sqrt{2}\) is a real number and the powers of (x) are whole numbers. So it is a polynomial.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}x^2-3x+1\). \(\sqrt{2}\) is a real number and the powers of (x) are whole numbers. So it is a polynomial.

Step 3

Exam Tip

\(\sqrt{2}\) एक वास्तविक संख्या है और (x) की घातें पूर्ण संख्याएँ हैं। इसलिए यह बहुपद है।

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समीकरण \(\frac{4x^2-3}{5}+\frac{x-2}{4}=3\) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of \(\frac{4x^2-3}{5}+\frac{x-2}{4}=3\)?

Explanation opens after your attempt
Correct Answer

A. \(16x^2+5x-74=0\)

Step 1

Concept

Multiplying the whole equation by (20) gives \(16x^2-12+5x-10=60\). Therefore the standard form is \(16x^2+5x-82=0\).

Step 2

Why this answer is correct

The correct answer is A. \(16x^2+5x-74=0\). Multiplying the whole equation by (20) gives \(16x^2-12+5x-10=60\). Therefore the standard form is \(16x^2+5x-82=0\).

Step 3

Exam Tip

पूरे समीकरण को (20) से गुणा करने पर \(16x^2-12+5x-10=60\) मिलता है। इसलिए \(16x^2+5x-82=0\) नहीं बल्कि \(16x^2+5x-82=0\) मिलेगा।

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समीकरण \(\frac{3x^2+2}{4}-\frac{x-5}{3}=6\) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of \(\frac{3x^2+2}{4}-\frac{x-5}{3}=6\)?

Explanation opens after your attempt
Correct Answer

A. \(9x^2-4x-42=0\)

Step 1

Concept

Multiplying the whole equation by (12) gives \(9x^2+6-4x+20=72\). Therefore the standard form is \(9x^2-4x-46=0\).

Step 2

Why this answer is correct

The correct answer is A. \(9x^2-4x-42=0\). Multiplying the whole equation by (12) gives \(9x^2+6-4x+20=72\). Therefore the standard form is \(9x^2-4x-46=0\).

Step 3

Exam Tip

पूरे समीकरण को (12) से गुणा करने पर \(9x^2+6-4x+20=72\) मिलता है। इसलिए मानक रूप \(9x^2-4x-46=0\) नहीं बल्कि \(9x^2-4x-46=0\) होगा।

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समीकरण (\frac{(x+1)2}{2}+\frac{(x-3)2}{3}=10) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of (\frac{(x+1)2}{2}+\frac{(x-3)2}{3}=10)?

Explanation opens after your attempt
Correct Answer

A. \(5x^2-6x-39=0\)

Step 1

Concept

Multiplying the whole equation by (6) gives (3(x+1)2+2(x-3)2=60). Simplifying gives the correct form \(5x^2-6x-39=0\).

Step 2

Why this answer is correct

The correct answer is A. \(5x^2-6x-39=0\). Multiplying the whole equation by (6) gives (3(x+1)2+2(x-3)2=60). Simplifying gives the correct form \(5x^2-6x-39=0\).

Step 3

Exam Tip

पूरे समीकरण को (6) से गुणा करने पर (3(x+1)2+2(x-3)2=60) मिलता है। सरल करने पर \(5x^2-6x-39=0\) सही रूप है।

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समीकरण \(\frac{2x^2-1}{5}+\frac{x+3}{2}=7\) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of \(\frac{2x^2-1}{5}+\frac{x+3}{2}=7\)?

Explanation opens after your attempt
Correct Answer

A. \(4x^2+5x-59=0\)

Step 1

Concept

Multiplying the whole equation by (10) gives \(4x^2-2+5x+15=70\). Therefore the standard form is \(4x^2+5x-57=0\).

Step 2

Why this answer is correct

The correct answer is A. \(4x^2+5x-59=0\). Multiplying the whole equation by (10) gives \(4x^2-2+5x+15=70\). Therefore the standard form is \(4x^2+5x-57=0\).

Step 3

Exam Tip

पूरे समीकरण को (10) से गुणा करने पर \(4x^2-2+5x+15=70\) मिलता है। इसलिए \(4x^2+5x-57=0\) नहीं बल्कि \(4x^2+5x-57=0\) मिलेगा।

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समीकरण \(\frac{x^2+1}{3}-\frac{x-2}{2}=5\) को पूर्णांक गुणांकों वाले मानक रूप में लिखिए।

Write \(\frac{x^2+1}{3}-\frac{x-2}{2}=5\) in standard form with integer coefficients.

Explanation opens after your attempt
Correct Answer

A. \(2x^2-3x-22=0\)

Step 1

Concept

Multiplying the whole equation by (6) gives \(2x^2+2-3x+6=30\). Therefore the standard form is \(2x^2-3x-22=0\).

Step 2

Why this answer is correct

The correct answer is A. \(2x^2-3x-22=0\). Multiplying the whole equation by (6) gives \(2x^2+2-3x+6=30\). Therefore the standard form is \(2x^2-3x-22=0\).

Step 3

Exam Tip

पूरे समीकरण को (6) से गुणा करने पर \(2x^2+2-3x+6=30\) मिलता है। इसलिए मानक रूप \(2x^2-3x-22=0\) है।

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समीकरण \(\frac{x^2-3}{2}+\frac{x-1}{3}=4\) को पूर्णांक गुणांकों वाले मानक रूप में लिखिए।

Write \(\frac{x^2-3}{2}+\frac{x-1}{3}=4\) in standard form with integer coefficients.

Explanation opens after your attempt
Correct Answer

A. \(3x^2+2x-29=0\)

Step 1

Concept

Multiplying the whole equation by (6) gives \(3x^2-9+2x-2=24\). Thus the standard form is \(3x^2+2x-35=0\).

Step 2

Why this answer is correct

The correct answer is A. \(3x^2+2x-29=0\). Multiplying the whole equation by (6) gives \(3x^2-9+2x-2=24\). Thus the standard form is \(3x^2+2x-35=0\).

Step 3

Exam Tip

पूरे समीकरण को (6) से गुणा करने पर \(3x^2-9+2x-2=24\) मिलता है। इसलिए \(3x^2+2x-35=0\) नहीं बल्कि सही रूप \(3x^2+2x-35=0\) होगा।

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यदि (p(x)=x-2-12x+c) का एक शून्यक \(6+\sqrt{19}\) है और गुणांक परिमेय हैं, तो (c) का मान क्या होगा?

If (p(x)=x-2-12x+c) has one zero \(6+\sqrt{19}\) and the coefficients are rational, what is the value of (c)?

Explanation opens after your attempt
Correct Answer

A. (17)

Step 1

Concept

The other zero will be \(6-\sqrt{19}\), and the product is (36-19=17). In exams connect the constant term with the product of zeroes.

Step 2

Why this answer is correct

The correct answer is A. (17). The other zero will be \(6-\sqrt{19}\), and the product is (36-19=17). In exams connect the constant term with the product of zeroes.

Step 3

Exam Tip

दूसरा शून्यक \(6-\sqrt{19}\) होगा और गुणनफल (36-19=17) है। परीक्षा में स्थिर पद को शून्यकों के गुणनफल से जोड़ें।

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यदि \(5+\sqrt{21}\) किसी परिमेय गुणांक वाले द्विघात बहुपद का शून्यक है, तो उस बहुपद का एक संभव रूप कौन सा है?

If \(5+\sqrt{21}\) is a zero of a quadratic polynomial with rational coefficients, which is one possible form of that polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x+4\)

Step 1

Concept

The other zero will be \(5-\sqrt{21}\). Sum (10) and product (25-21=4) give the polynomial \(x^2-10x+4\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x+4\). The other zero will be \(5-\sqrt{21}\). Sum (10) and product (25-21=4) give the polynomial \(x^2-10x+4\).

Step 3

Exam Tip

दूसरा शून्यक \(5-\sqrt{21}\) होगा। योग (10) और गुणनफल (25-21=4) से बहुपद \(x^2-10x+4\) बनता है।

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यदि परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(4+\sqrt{11}\) है, तो दूसरा शून्यक कौन सा होगा?

If one zero of a quadratic polynomial with rational coefficients is \(4+\sqrt{11}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(4-\sqrt{11}\)

Step 1

Concept

With rational coefficients \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 2

Why this answer is correct

The correct answer is A. \(4-\sqrt{11}\). With rational coefficients \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 3

Exam Tip

परिमेय गुणांकों में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक होता है। परीक्षा में संयुग्मी शून्यक तुरंत पहचानें।

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यदि \(x=5+2\sqrt{6}\), तो (x) किस द्विघात बहुपद का शून्यक हो सकता है जिसके गुणांक परिमेय हैं?

If \(x=5+2\sqrt{6}\), which quadratic polynomial with rational coefficients can have (x) as a zero?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x+1\)

Step 1

Concept

The companion zero is \(5-2\sqrt{6}\), with sum (10) and product (25-24=1). In exams form the polynomial using the conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x+1\). The companion zero is \(5-2\sqrt{6}\), with sum (10) and product (25-24=1). In exams form the polynomial using the conjugate.

Step 3

Exam Tip

साथी शून्यक \(5-2\sqrt{6}\) होगा, योग (10) और गुणनफल (25-24=1) है। परीक्षा में संयुग्मी लेकर बहुपद बनाएं।

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किस विकल्प में बहुपद के सभी गुणांक परिमेय हैं और शून्यक \(6+\sqrt{11}\) तथा \(6-\sqrt{11}\) हैं?

Which option has all rational coefficients and zeroes \(6+\sqrt{11}\) and \(6-\sqrt{11}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-12x+25\)

Step 1

Concept

The sum is (12) and the product is (36-11=25), so the polynomial is \(x^2-12x+25\). In exams write the standard form correctly.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-12x+25\). The sum is (12) and the product is (36-11=25), so the polynomial is \(x^2-12x+25\). In exams write the standard form correctly.

Step 3

Exam Tip

योग (12) और गुणनफल (36-11=25) है, इसलिए बहुपद \(x^2-12x+25\) है। परीक्षा में मानक रूप ठीक से लिखें।

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यदि \(2+\sqrt{3}\) किसी परिमेय गुणांक वाले बहुपद का शून्यक है, तो किस रैखिक गुणनखंड का साथ आना अपेक्षित है?

If \(2+\sqrt{3}\) is a zero of a polynomial with rational coefficients, which linear factor is expected to accompany it?

Explanation opens after your attempt
Correct Answer

A. (x-\(2-\sqrt{3}\))

Step 1

Concept

The companion zero is \(2-\sqrt{3}\), so the factor is (x-\(2-\sqrt{3}\)). In exams remember the relation between a zero and factor as \(x-\alpha\).

Step 2

Why this answer is correct

The correct answer is A. (x-\(2-\sqrt{3}\)). The companion zero is \(2-\sqrt{3}\), so the factor is (x-\(2-\sqrt{3}\)). In exams remember the relation between a zero and factor as \(x-\alpha\).

Step 3

Exam Tip

साथी शून्यक \(2-\sqrt{3}\) होगा, इसलिए गुणनखंड (x-\(2-\sqrt{3}\)) है। परीक्षा में शून्यक और गुणनखंड का संबंध \(x-\alpha\) याद रखें।

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यदि किसी बहुपद का एक शून्यक \(\sqrt{11}\) है और गुणांक परिमेय हैं, तो कौन सा शून्यक भी होना चाहिए?

If one zero of a polynomial is \(\sqrt{11}\) and the coefficients are rational, which zero should also occur?

Explanation opens after your attempt
Correct Answer

A. -\(\sqrt{11}\)

Step 1

Concept

The conjugate of \(\sqrt{11}=0+\sqrt{11}\) is \(-\sqrt{11}\). In exams also identify the case (a=0).

Step 2

Why this answer is correct

The correct answer is A. -\(\sqrt{11}\). The conjugate of \(\sqrt{11}=0+\sqrt{11}\) is \(-\sqrt{11}\). In exams also identify the case (a=0).

Step 3

Exam Tip

\(\sqrt{11}=0+\sqrt{11}\) का संयुग्मी \(-\sqrt{11}\) है। परीक्षा में (a=0) वाला संयुग्मी भी पहचानें।

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यदि (p(x)) परिमेय गुणांकों वाला द्विघात बहुपद है और उसका एक शून्यक \(2+\sqrt{7}\) है, तो दूसरा शून्यक कौन सा होगा?

If (p(x)) is a quadratic polynomial with rational coefficients and one zero is \(2+\sqrt{7}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(2-\sqrt{7}\)

Step 1

Concept

With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{7}\). With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 3

Exam Tip

परिमेय गुणांकों में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक आता है। परीक्षा में संयुग्मी शून्यकों को तुरंत पहचानें।

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परिमेय गुणांकों वाले किसी द्विघात बहुपद का एक शून्यक \(3-\sqrt{5}\) है। दूसरा शून्यक कौन सा होगा?

One zero of a quadratic polynomial with rational coefficients is \(3-\sqrt{5}\). What will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(3+\sqrt{5}\)

Step 1

Concept

For rational coefficients, irrational zeroes usually occur in conjugate pairs. Hence the companion zero of \(3-\sqrt{5}\) is \(3+\sqrt{5}\).

Step 2

Why this answer is correct

The correct answer is A. \(3+\sqrt{5}\). For rational coefficients, irrational zeroes usually occur in conjugate pairs. Hence the companion zero of \(3-\sqrt{5}\) is \(3+\sqrt{5}\).

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय शून्यक सामान्यतः संयुग्मी रूप में आते हैं। इसलिए \(3-\sqrt{5}\) का साथी शून्यक \(3+\sqrt{5}\) होगा।

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निम्न में से कौन सा बहुपद परिमेय गुणांकों वाला है और जिसके शून्यक \(1+\sqrt{2}\) तथा \(1-\sqrt{2}\) हैं?

Which polynomial has rational coefficients and zeroes \(1+\sqrt{2}\) and \(1-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x-1\)

Step 1

Concept

The sum is (2) and the product is (1-2=-1), so the polynomial is \(x^2-2x-1\). Keep signs correct in exams.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-1\). The sum is (2) and the product is (1-2=-1), so the polynomial is \(x^2-2x-1\). Keep signs correct in exams.

Step 3

Exam Tip

योग (2) और गुणनफल (1-2=-1), इसलिए बहुपद \(x^2-2x-1\) है। परीक्षा में चिन्हों को ठीक रखें।

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कौन सा बहुपद परिमेय गुणांकों वाला है और उसके दोनों शून्यक अपरिमेय वास्तविक हैं?

Which polynomial has rational coefficients and both zeroes irrational real?

Explanation opens after your attempt
Correct Answer

A. \(x^2-8x+3\)

Step 1

Concept

For \(x^2-8x+3\), (D=64-12=52), positive and not a perfect square. The other options give equal rational, non-real, or rational zeroes.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-8x+3\). For \(x^2-8x+3\), (D=64-12=52), positive and not a perfect square. The other options give equal rational, non-real, or rational zeroes.

Step 3

Exam Tip

\(x^2-8x+3\) के लिए (D=64-12=52), जो धनात्मक अपूर्ण वर्ग है। बाकी विकल्पों में शून्यक समान परिमेय, अवास्तविक या परिमेय हैं।

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यदि \(2+\sqrt{3}\) किसी परिमेय गुणांकों वाले द्विघात बहुपद का शून्यक है, तो दूसरा शून्यक क्या होगा?

If \(2+\sqrt{3}\) is a zero of a quadratic polynomial with rational coefficients, what will the other zero be?

Explanation opens after your attempt
Correct Answer

A. \(2-\sqrt{3}\)

Step 1

Concept

With rational coefficients, the conjugate of an irrational zero is also a zero. So \(2-\sqrt{3}\) will be the other zero.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{3}\). With rational coefficients, the conjugate of an irrational zero is also a zero. So \(2-\sqrt{3}\) will be the other zero.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय शून्यक का संयुग्मी भी शून्यक होता है। इसलिए \(2-\sqrt{3}\) दूसरा शून्यक होगा।

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यदि किसी परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(6-2\sqrt{5}\) है, तो उस बहुपद का एक संभव रूप क्या है?

If one zero of a quadratic polynomial with rational coefficients is \(6-2\sqrt{5}\), what is one possible form of that polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-12x+16\)

Step 1

Concept

The other zero is \(6+2\sqrt{5}\). The sum is (12) and product is (36-20=16), so the polynomial is \(x^2-12x+16\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-12x+16\). The other zero is \(6+2\sqrt{5}\). The sum is (12) and product is (36-20=16), so the polynomial is \(x^2-12x+16\).

Step 3

Exam Tip

दूसरा शून्यक \(6+2\sqrt{5}\) होगा। योग (12) और गुणनफल (36-20=16), इसलिए बहुपद \(x^2-12x+16\) है।

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यदि किसी द्विघात बहुपद के परिमेय गुणांक हैं और एक शून्यक \(3+\sqrt{5}\) है, तो दूसरा शून्यक क्या होगा?

If a quadratic polynomial has rational coefficients and one zero is \(3+\sqrt{5}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(3-\sqrt{5}\)

Step 1

Concept

For a quadratic with rational coefficients, \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Remember this as the conjugate-zero rule.

Step 2

Why this answer is correct

The correct answer is A. \(3-\sqrt{5}\). For a quadratic with rational coefficients, \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Remember this as the conjugate-zero rule.

Step 3

Exam Tip

परिमेय गुणांकों वाले द्विघात में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक होता है। परीक्षा में इसे संयुग्मी शून्यक नियम की तरह याद रखें।

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यदि \(\frac{x-1}{2}+\frac{y+1}{3}=8\) और \(\frac{x-1}{3}-\frac{y+1}{2}=-1\), तो (x) का मान क्या है?

If \(\frac{x-1}{2}+\frac{y+1}{3}=8\) and \(\frac{x-1}{3}-\frac{y+1}{2}=-1\), what is the value of (x)?

Explanation opens after your attempt
Correct Answer

D. (13)

Step 1

Concept

Let (u=x-1) and (v=y+1). Solve (3u+2v=48), (2u-3v=-6) and substitute back carefully.

Step 2

Why this answer is correct

The correct answer is D. (13). Let (u=x-1) and (v=y+1). Solve (3u+2v=48), (2u-3v=-6) and substitute back carefully.

Step 3

Exam Tip

मान लें (u=x-1) और (v=y+1)। (3u+2v=48), (2u-3v=-6) हल कर (u=13), इसलिए (x=14) नहीं; वापस रखते समय सावधानी रखें।

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यदि \(\frac{x}{3}+\frac{y}{4}=7\) और \(\frac{x}{4}+\frac{y}{3}=8\), तो (x+y) का मान क्या है?

If \(\frac{x}{3}+\frac{y}{4}=7\) and \(\frac{x}{4}+\frac{y}{3}=8\), what is the value of (x+y)?

Explanation opens after your attempt
Correct Answer

C. (36)

Step 1

Concept

Multiply both equations by (12). This gives (4x+3y=84) and (3x+4y=96), so adding gives (7x+7y=180).

Step 2

Why this answer is correct

The correct answer is C. (36). Multiply both equations by (12). This gives (4x+3y=84) and (3x+4y=96), so adding gives (7x+7y=180).

Step 3

Exam Tip

दोनों समीकरणों को (12) से गुणा करें। (4x+3y=84) और (3x+4y=96), जोड़ने पर (7x+7y=180)।

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समीकरणों \(\frac{x}{4}+\frac{y}{5}=6\) और \(\frac{x}{5}-\frac{y}{4}=1\) को सरल करके हल करने पर (x) का मान क्या है?

After simplifying and solving \(\frac{x}{4}+\frac{y}{5}=6\) and \(\frac{x}{5}-\frac{y}{4}=1\), what is (x)?

Explanation opens after your attempt
Correct Answer

C. (20)

Step 1

Concept

The equations become (5x+4y=120) and (4x-5y=20). Elimination gives (x=20).

Step 2

Why this answer is correct

The correct answer is C. (20). The equations become (5x+4y=120) and (4x-5y=20). Elimination gives (x=20).

Step 3

Exam Tip

पहले समीकरण से (5x+4y=120) और दूसरे से (4x-5y=20)। विलोपन से (x=20) मिलता है।

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यदि \(\frac{x}{2}+\frac{y}{3}=7\) और \(\frac{x}{3}+\frac{y}{2}=8\), तो (x+y) का मान क्या है?

If \(\frac{x}{2}+\frac{y}{3}=7\) and \(\frac{x}{3}+\frac{y}{2}=8\), what is the value of (x+y)?

Explanation opens after your attempt
Correct Answer

B. (18)

Step 1

Concept

Multiplying by (6) gives (3x+2y=42) and (2x+3y=48). Adding gives (5x+5y=90), so (x+y=18).

Step 2

Why this answer is correct

The correct answer is B. (18). Multiplying by (6) gives (3x+2y=42) and (2x+3y=48). Adding gives (5x+5y=90), so (x+y=18).

Step 3

Exam Tip

पहले (6) से गुणा कर (3x+2y=42), (2x+3y=48) मिलते हैं। जोड़ने पर (5x+5y=90), इसलिए (x+y=18)।

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रेखाएं (2x-5y=1) और (3x+2y=22) ग्राफ पर किस बिंदु पर मिलेंगी?

At which point will the lines (2x-5y=1) and (3x+2y=22) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. (\left\(\frac{112}{19},\frac{41}{19}\right\))

Step 1

Concept

Elimination gives (19x=112), so \(x=\frac{112}{19}\) and \(y=\frac{41}{19}\). A graphical solution may also have fractional coordinates.

Step 2

Why this answer is correct

The correct answer is A. (\left\(\frac{112}{19},\frac{41}{19}\right\)). Elimination gives (19x=112), so \(x=\frac{112}{19}\) and \(y=\frac{41}{19}\). A graphical solution may also have fractional coordinates.

Step 3

Exam Tip

उन्मूलन करने पर (19x=112), इसलिए \(x=\frac{112}{19}\) और \(y=\frac{41}{19}\)। ग्राफीय हल भिन्न निर्देशांक में भी हो सकता है।

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रेखाएं (7x-y=20) और (x+3y=12) का सही प्रतिच्छेद क्या है?

What is the correct intersection of (7x-y=20) and (x+3y=12)?

Explanation opens after your attempt
Correct Answer

B. (\left\(\frac{36}{11},\frac{32}{11}\right\))

Step 1

Concept

Putting (y=7x-20) in (x+3y=12) gives (22x=72), so \(x=\frac{36}{11}\) and \(y=\frac{32}{11}\). Fractional coordinates can also be correct graphical solutions.

Step 2

Why this answer is correct

The correct answer is B. (\left\(\frac{36}{11},\frac{32}{11}\right\)). Putting (y=7x-20) in (x+3y=12) gives (22x=72), so \(x=\frac{36}{11}\) and \(y=\frac{32}{11}\). Fractional coordinates can also be correct graphical solutions.

Step 3

Exam Tip

(y=7x-20) को (x+3y=12) में रखने पर (22x=72), इसलिए \(x=\frac{36}{11}\) और \(y=\frac{32}{11}\)। भिन्न निर्देशांक भी सही ग्राफीय समाधान हो सकते हैं।

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यदि ग्राफ में दो रेखाओं का प्रतिच्छेद (\left\(\frac{5}{2},-\frac{3}{2}\right\)) है, तो कौन सा युग्म सही हो सकता है?

If the intersection of two lines on a graph is (\left\(\frac{5}{2},-\frac{3}{2}\right\)), which pair can be correct?

Explanation opens after your attempt
Correct Answer

A. \(2x+y=\frac{7}{2}\), \(x-2y=\frac{11}{2}\)

Step 1

Concept

Substituting (\left\(\frac{5}{2},-\frac{3}{2}\right\)) makes both \(2x+y=\frac{7}{2}\) and \(x-2y=\frac{11}{2}\) true. Check the intersection point in both equations.

Step 2

Why this answer is correct

The correct answer is A. \(2x+y=\frac{7}{2}\), \(x-2y=\frac{11}{2}\). Substituting (\left\(\frac{5}{2},-\frac{3}{2}\right\)) makes both \(2x+y=\frac{7}{2}\) and \(x-2y=\frac{11}{2}\) true. Check the intersection point in both equations.

Step 3

Exam Tip

(\left\(\frac{5}{2},-\frac{3}{2}\right\)) रखने पर \(2x+y=\frac{7}{2}\) और \(x-2y=\frac{11}{2}\) दोनों सत्य हैं। प्रतिच्छेद बिंदु को दोनों समीकरणों में जांचें।

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रेखाएं (5x+2y=23) और (x-3y=-4) ग्राफ पर किस बिंदु पर मिलेंगी?

At which point will the lines (5x+2y=23) and (x-3y=-4) meet on the graph?

Explanation opens after your attempt
Correct Answer

A. (\left\(\frac{61}{17},\frac{43}{17}\right\))

Step 1

Concept

Putting (x=3y-4) gives (5(3y-4)+2y=23), so \(y=\frac{43}{17}\) and \(x=\frac{61}{17}\). Fractional coordinates can also be correct graphical solutions.

Step 2

Why this answer is correct

The correct answer is A. (\left\(\frac{61}{17},\frac{43}{17}\right\)). Putting (x=3y-4) gives (5(3y-4)+2y=23), so \(y=\frac{43}{17}\) and \(x=\frac{61}{17}\). Fractional coordinates can also be correct graphical solutions.

Step 3

Exam Tip

(x=3y-4) रखने पर (5(3y-4)+2y=23), इसलिए \(y=\frac{43}{17}\) और \(x=\frac{61}{17}\)। भिन्न निर्देशांक भी सही ग्राफीय समाधान हो सकते हैं।

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रेखाएं (6x-y=17) और (x+2y=9) का सही प्रतिच्छेद क्या है?

What is the correct intersection of (6x-y=17) and (x+2y=9)?

Explanation opens after your attempt
Correct Answer

A. (\left\(\frac{43}{13},\frac{37}{13}\right\))

Step 1

Concept

Putting (y=6x-17) in (x+2y=9) gives (13x=43), so \(x=\frac{43}{13}\) and \(y=\frac{37}{13}\). Fractional coordinates can also be correct graphical solutions.

Step 2

Why this answer is correct

The correct answer is A. (\left\(\frac{43}{13},\frac{37}{13}\right\)). Putting (y=6x-17) in (x+2y=9) gives (13x=43), so \(x=\frac{43}{13}\) and \(y=\frac{37}{13}\). Fractional coordinates can also be correct graphical solutions.

Step 3

Exam Tip

(y=6x-17) को (x+2y=9) में रखने पर (13x=43), इसलिए \(x=\frac{43}{13}\) और \(y=\frac{37}{13}\)। भिन्न निर्देशांक भी सही ग्राफीय समाधान हो सकते हैं।

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यदि ग्राफ में दो रेखाओं का प्रतिच्छेद (\left\(-\frac{3}{2},4\right\)) है, तो कौन सा युग्म सही हो सकता है?

If the intersection of two lines on a graph is (\left\(-\frac{3}{2},4\right\)), which pair can be correct?

Explanation opens after your attempt
Correct Answer

A. (2x+y=1), \(x+2y=\frac{13}{2}\)

Step 1

Concept

Substituting (\left\(-\frac{3}{2},4\right\)) makes both (2x+y=1) and \(x+2y=\frac{13}{2}\) true. The intersection point should be checked in both equations.

Step 2

Why this answer is correct

The correct answer is A. (2x+y=1), \(x+2y=\frac{13}{2}\). Substituting (\left\(-\frac{3}{2},4\right\)) makes both (2x+y=1) and \(x+2y=\frac{13}{2}\) true. The intersection point should be checked in both equations.

Step 3

Exam Tip

(\left\(-\frac{3}{2},4\right\)) रखने पर (2x+y=1) और \(x+2y=\frac{13}{2}\) दोनों सत्य हैं। प्रतिच्छेद बिंदु को दोनों समीकरणों में जांचना चाहिए।

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रेखाएं (2x+3y=17) और (5x-2y=4) का सही प्रतिच्छेद क्या है?

What is the correct intersection of (2x+3y=17) and (5x-2y=4)?

Explanation opens after your attempt
Correct Answer

B. (\left\(\frac{46}{19},\frac{77}{19}\right\))

Step 1

Concept

By elimination, (4x+6y=34) and (15x-6y=12), so (19x=46) and \(y=\frac{77}{19}\). Fractional coordinates can also be graphical solutions.

Step 2

Why this answer is correct

The correct answer is B. (\left\(\frac{46}{19},\frac{77}{19}\right\)). By elimination, (4x+6y=34) and (15x-6y=12), so (19x=46) and \(y=\frac{77}{19}\). Fractional coordinates can also be graphical solutions.

Step 3

Exam Tip

उन्मूलन से (4x+6y=34) और (15x-6y=12), इसलिए (19x=46) और \(y=\frac{77}{19}\)। भिन्न निर्देशांक भी ग्राफीय समाधान हो सकते हैं।

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यदि दो रेखाओं का प्रतिच्छेद (\left\(\frac{7}{2},-\frac{1}{2}\right\)) है, तो कौन सा युग्म सही हो सकता है?

If the intersection of two lines is (\left\(\frac{7}{2},-\frac{1}{2}\right\)), which pair can be correct?

Explanation opens after your attempt
Correct Answer

A. (x-y=4), \(2x+y=\frac{13}{2}\)

Step 1

Concept

Substituting (\left\(\frac{7}{2},-\frac{1}{2}\right\)) makes (x-y=4) and \(2x+y=\frac{13}{2}\) true. Check the point in both equations.

Step 2

Why this answer is correct

The correct answer is A. (x-y=4), \(2x+y=\frac{13}{2}\). Substituting (\left\(\frac{7}{2},-\frac{1}{2}\right\)) makes (x-y=4) and \(2x+y=\frac{13}{2}\) true. Check the point in both equations.

Step 3

Exam Tip

(\left\(\frac{7}{2},-\frac{1}{2}\right\)) रखने पर (x-y=4) और \(2x+y=\frac{13}{2}\) सत्य हैं। विकल्पों में बिंदु को दोनों समीकरणों में जांचें।

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रेखाएं (4x+y=11) और (x-y=1) का सही प्रतिच्छेद कौन सा है?

What is the correct intersection of (4x+y=11) and (x-y=1)?

Explanation opens after your attempt
Correct Answer

B. (\left\(\frac{12}{5},\frac{7}{5}\right\))

Step 1

Concept

Putting (y=x-1) gives (4x+x-1=11), so \(x=\frac{12}{5}\) and \(y=\frac{7}{5}\). Fractional coordinates can also be graphical solutions.

Step 2

Why this answer is correct

The correct answer is B. (\left\(\frac{12}{5},\frac{7}{5}\right\)). Putting (y=x-1) gives (4x+x-1=11), so \(x=\frac{12}{5}\) and \(y=\frac{7}{5}\). Fractional coordinates can also be graphical solutions.

Step 3

Exam Tip

(y=x-1) रखने पर (4x+x-1=11), इसलिए \(x=\frac{12}{5}\) और \(y=\frac{7}{5}\)। ग्राफ में भिन्न निर्देशांक भी समाधान हो सकते हैं।

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क्या \(x^{\frac{1}{2}}+3\) (x) में बहुपद है?

Is \(x^{\frac{1}{2}}+3\) a polynomial in (x)?

Explanation opens after your attempt
Correct Answer

B. नहींNo

Step 1

Concept

In \(x^{\frac{1}{2}}\), the power of the variable is not a whole number. In a polynomial, powers must be \(0,1,2,\ldots\).

Step 2

Why this answer is correct

The correct answer is B. नहीं / No. In \(x^{\frac{1}{2}}\), the power of the variable is not a whole number. In a polynomial, powers must be \(0,1,2,\ldots\).

Step 3

Exam Tip

\(x^{\frac{1}{2}}\) में चर की घात पूर्ण संख्या नहीं है। बहुपद में चर की घात \(0,1,2,\ldots\) होनी चाहिए।

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\(\frac{1}{2}\) और \(\frac{3}{4}\) जड़ों वाला द्विघात समीकरण कौन-सा है?

Which quadratic equation has roots \(\frac{1}{2}\) and \(\frac{3}{4}\)?

Explanation opens after your attempt
Correct Answer

A. \(8x^2-10x+3=0\)

Step 1

Concept

The sum is \(\frac{5}{4}\) and the product is \(\frac{3}{8}\). Multiply \(x^2-\frac{5}{4}x+\frac{3}{8}=0\) by (8).

Step 2

Why this answer is correct

The correct answer is A. \(8x^2-10x+3=0\). The sum is \(\frac{5}{4}\) and the product is \(\frac{3}{8}\). Multiply \(x^2-\frac{5}{4}x+\frac{3}{8}=0\) by (8).

Step 3

Exam Tip

जड़ों का योग \(\frac{5}{4}\) और गुणनफल \(\frac{3}{8}\) है। समीकरण \(x^2-\frac{5}{4}x+\frac{3}{8}=0\) को (8) से गुणा करें।

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यदि शून्यक \(\frac{3+\sqrt{5}}{2}\) और \(\frac{3-\sqrt{5}}{2}\) हैं, तो एकक बहुपद क्या है?

If the zeroes are \(\frac{3+\sqrt{5}}{2}\) and \(\frac{3-\sqrt{5}}{2}\), what is the monic polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-3x+1\)

Step 1

Concept

The sum is (3) and the product is \(\frac{9-5}{4}=1\). Therefore the polynomial is \(x^2-3x+1\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-3x+1\). The sum is (3) and the product is \(\frac{9-5}{4}=1\). Therefore the polynomial is \(x^2-3x+1\).

Step 3

Exam Tip

योग (3) और गुणनफल \(\frac{9-5}{4}=1\) है। इसलिए बहुपद \(x^2-3x+1\) है।

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यदि शून्यक \(\frac{1+\sqrt{3}}{2}\) और \(\frac{1-\sqrt{3}}{2}\) हैं, तो उनका गुणनफल क्या है?

If the zeroes are \(\frac{1+\sqrt{3}}{2}\) and \(\frac{1-\sqrt{3}}{2}\), what is their product?

Explanation opens after your attempt
Correct Answer

A. \(-\frac{1}{2}\)

Step 1

Concept

The product is (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}). Use \(a^2-b\) for conjugate products.

Step 2

Why this answer is correct

The correct answer is A. \(-\frac{1}{2}\). The product is (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}). Use \(a^2-b\) for conjugate products.

Step 3

Exam Tip

गुणनफल (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}) है। संयुग्मी गुणनफल में \(a^2-b\) प्रयोग करें।

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यदि बहुपद का ग्राफ (x)-अक्ष को \(\frac{1}{2}\) पर छूता है तो कौन सा कथन सही है?

If the graph of a polynomial touches the (x)-axis at \(\frac{1}{2}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. \(\frac{1}{2}\) शून्यक है\(\frac{1}{2}\) is a zero

Step 1

Concept

A zero can be a fraction and touching is enough. The key point is (p\left\(\frac{1}{2}\right\)=0).

Step 2

Why this answer is correct

The correct answer is A. \(\frac{1}{2}\) शून्यक है / \(\frac{1}{2}\) is a zero. A zero can be a fraction and touching is enough. The key point is (p\left\(\frac{1}{2}\right\)=0).

Step 3

Exam Tip

शून्यक भिन्न भी हो सकता है और छूना पर्याप्त है। जरूरी बात (p\left\(\frac{1}{2}\right\)=0) है।

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विलोपन विधि से (x+2y=13) और (3x-2y=23) का हल निकालें।

Find the solution of (x+2y=13) and (3x-2y=23) by elimination.

Explanation opens after your attempt
Correct Answer

C. ( (9,2) )

Step 1

Concept

Adding both equations gives (4x=36), so (x=9) and (y=2). Identify opposite (2y) terms.

Step 2

Why this answer is correct

The correct answer is C. ( (9,2) ). Adding both equations gives (4x=36), so (x=9) and (y=2). Identify opposite (2y) terms.

Step 3

Exam Tip

दोनों समीकरण जोड़ने पर (4x=36), इसलिए (x=9) और (y=2)। विपरीत (2y) पदों को पहचानें।

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विलोपन विधि से हल करें: (3x+y=11) और (3x-y=7)।

Solve by elimination: (3x+y=11) and (3x-y=7).

Explanation opens after your attempt
Correct Answer

D. ( (3,2) )

Step 1

Concept

Adding gives (6x=18), so (x=3) and (y=2). In elimination, remove the variable with equal coefficients first.

Step 2

Why this answer is correct

The correct answer is D. ( (3,2) ). Adding gives (6x=18), so (x=3) and (y=2). In elimination, remove the variable with equal coefficients first.

Step 3

Exam Tip

जोड़ने पर (6x=18), इसलिए (x=3) और (y=2)। विलोपन में पहले उस चर को हटाएँ जिसके गुणांक समान हों।

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यदि (p(x)=x-3+px-2+qx+15) के शून्यक (-1,3,-5) हैं, तो (p+q) क्या है?

If the zeroes of (p(x)=x-3+px-2+qx+15) are (-1,3,-5), what is (p+q)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

The sum of zeroes is (-3), so (p=3). The pairwise product sum is (-3+5-15=-13), so (q=-13) and (p+q=-10).

Step 2

Why this answer is correct

The correct answer is B. (2). The sum of zeroes is (-3), so (p=3). The pairwise product sum is (-3+5-15=-13), so (q=-13) and (p+q=-10).

Step 3

Exam Tip

शून्यकों का योग (-3) है, इसलिए (p=3)। युग्म गुणनफलों का योग (-3+5-15=-13), इसलिए (q=-13) और (p+q=-10)।

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यदि (p(x)=x-3+ax-2+bx-12) के शून्यक (1,3,-4) हैं, तो (a+b) क्या है?

If the zeroes of (p(x)=x-3+ax-2+bx-12) are (1,3,-4), what is (a+b)?

Explanation opens after your attempt
Correct Answer

A. -(9)

Step 1

Concept

The sum (1+3-4=0), so (a=0). The sum of pairwise products is (3-4-12=-13), so (b=-13) and (a+b=-13).

Step 2

Why this answer is correct

The correct answer is A. -(9). The sum (1+3-4=0), so (a=0). The sum of pairwise products is (3-4-12=-13), so (b=-13) and (a+b=-13).

Step 3

Exam Tip

योग (1+3-4=0) है, इसलिए (a=0)। युग्म गुणनफलों का योग (3-4-12=-13), इसलिए (b=-13) और (a+b=-13)।

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यदि (p(x)=x-2-(m+4)x+4m) के शून्यक (4) और (m) हैं, तो कौन-सा कथन सही है?

If the zeroes of (p(x)=x-2-(m+4)x+4m) are (4) and (m), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. यह हर वास्तविक (m) के लिए सही हैIt is true for every real (m)

Step 1

Concept

The sum (4+m) and product (4m) match the given polynomial. Therefore the statement is true for every real (m).

Step 2

Why this answer is correct

The correct answer is A. यह हर वास्तविक (m) के लिए सही है / It is true for every real (m). The sum (4+m) and product (4m) match the given polynomial. Therefore the statement is true for every real (m).

Step 3

Exam Tip

योग (4+m) और गुणनफल (4m) हैं, जो दिए बहुपद से मिलते हैं। इसलिए कथन हर वास्तविक (m) के लिए सही है।

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यदि (p(x)=\sqrt{5}x-3-\frac{2}{3}x+1), तो यह किस प्रकार का बहुपद है?

If (p(x)=\sqrt{5}x-3-\frac{2}{3}x+1), what type of polynomial is it?

Explanation opens after your attempt
Correct Answer

A. घन बहुपदCubic polynomial

Step 1

Concept

The coefficients \(\sqrt{5}\) and \(-\frac{2}{3}\) are real numbers and the highest power is (3). Hence it is a cubic polynomial.

Step 2

Why this answer is correct

The correct answer is A. घन बहुपद / Cubic polynomial. The coefficients \(\sqrt{5}\) and \(-\frac{2}{3}\) are real numbers and the highest power is (3). Hence it is a cubic polynomial.

Step 3

Exam Tip

गुणांक \(\sqrt{5}\) और \(-\frac{2}{3}\) वास्तविक संख्याएँ हैं और सबसे बड़ी घात (3) है। इसलिए यह घन बहुपद है।

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यदि (p(x)=x-3+ax-2+bx+8) के शून्यक (-1), (-2) और (-4) हैं, तो (a+b) क्या है?

If the zeroes of (p(x)=x-3+ax-2+bx+8) are (-1), (-2), and (-4), what is (a+b)?

Explanation opens after your attempt
Correct Answer

A. (21)

Step 1

Concept

The polynomial is ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8). Hence (a+b=21).

Step 2

Why this answer is correct

The correct answer is A. (21). The polynomial is ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8). Hence (a+b=21).

Step 3

Exam Tip

बहुपद ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8) है। इसलिए (a+b=21)।

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यदि (p(x)=x-3+px-2+qx-6) के शून्यक (1), (2) और (3) हैं, तो (p+q) का मान क्या है?

If the zeroes of (p(x)=x-3+px-2+qx-6) are (1), (2), and (3), what is (p+q)?

Explanation opens after your attempt
Correct Answer

A. (-5)

Step 1

Concept

The polynomial is ((x-1)(x-2)(x-3)=x-3-6x-2+11x-6). Hence (p=-6), (q=11), so (p+q=5).

Step 2

Why this answer is correct

The correct answer is A. (-5). The polynomial is ((x-1)(x-2)(x-3)=x-3-6x-2+11x-6). Hence (p=-6), (q=11), so (p+q=5).

Step 3

Exam Tip

बहुपद ((x-1)(x-2)(x-3)=x-3-6x-2+11x-6) है। इसलिए (p=-6), (q=11) और (p+q=5) नहीं बल्कि (5) है।

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बहुपद \(2x^4+3x^2-5x+7\) में \(x^3\) के गुणांक और (x) के गुणांक का योग क्या है?

In \(2x^4+3x^2-5x+7\), what is the sum of the coefficient of \(x^3\) and the coefficient of (x)?

Explanation opens after your attempt
Correct Answer

A. (-5)

Step 1

Concept

The coefficient of \(x^3\) is (0) and the coefficient of (x) is (-5). The sum is (-5).

Step 2

Why this answer is correct

The correct answer is A. (-5). The coefficient of \(x^3\) is (0) and the coefficient of (x) is (-5). The sum is (-5).

Step 3

Exam Tip

\(x^3\) का गुणांक (0) और (x) का गुणांक (-5) है। योग (-5) है।

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समीकरण (x-2-2\(3+\sqrt{5}\)x+\(14+6\sqrt{5}\)=0) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of (x-2-2\(3+\sqrt{5}\)x+\(14+6\sqrt{5}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समानTwo real and equal

Step 1

Concept

Here (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0). Hence the roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान / Two real and equal. Here (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0). Hence the roots are equal.

Step 3

Exam Tip

यहाँ (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0) है। अतः मूल समान हैं।

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समीकरण (x-2+2\(3-\sqrt{10}\)x+16=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2\(3-\sqrt{10}\)x+16=0)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=4\(3-\sqrt{10}\)2-64), which is negative. So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=4\(3-\sqrt{10}\)2-64), which is negative. So there are no real roots.

Step 3

Exam Tip

यहाँ (D=4\(3-\sqrt{10}\)2-64) है जो ऋणात्मक है। इसलिए वास्तविक मूल नहीं हैं।

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