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16 results found for "zero b" in Class 10.

Question Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 27

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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Question Hard Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 22

एक छात्र कहता है कि यदि ग्राफ (y)-अक्ष को ((0,0)) पर काटता है, तो (0) शून्यक नहीं हो सकता क्योंकि यह (y)-अक्ष पर है। सही निर्णय क्या है?

A student says that if a graph cuts the (y)-axis at ((0,0)), then (0) cannot be a zero because it is on the (y)-axis. What is the correct decision?

Explanation opens after your attempt
Correct Answer

B. कथन गलत है क्योंकि ((0,0)) (x)-अक्ष पर भी हैThe statement is wrong because ((0,0)) is also on the (x)-axis

Step 1

Concept

The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 2

Why this answer is correct

The correct answer is B. कथन गलत है क्योंकि ((0,0)) (x)-अक्ष पर भी है / The statement is wrong because ((0,0)) is also on the (x)-axis. The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 3

Exam Tip

मूल बिंदु दोनों अक्षों पर होता है, इसलिए (p(0)=0) है। टिप: ((0,0)) को विशेष बिंदु समझें।

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Question Easy Mathematics Quadratic Equations Nature of Roots Class 10 Level 37

समीकरण \(2x^2+8=0\) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of \(2x^2+8=0\)?

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहींno real roots

Step 1

Concept

(D=02-4(2)(8)=-64<0). Therefore the equation will have no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं / no real roots. (D=02-4(2)(8)=-64<0). Therefore the equation will have no real roots.

Step 3

Exam Tip

(D=02-4(2)(8)=-64<0) है। इसलिए समीकरण के वास्तविक मूल नहीं होंगे।

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Question Easy Mathematics Quadratic Equations Nature of Roots Class 10 Level 37

समीकरण \(4x^2-1=0\) के मूल कैसे होंगे?

How will the roots of \(4x^2-1=0\) be?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और असमानtwo real and distinct

Step 1

Concept

(D=02-4(4)(-1)=16>0). Hence two distinct real roots will be obtained.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और असमान / two real and distinct. (D=02-4(4)(-1)=16>0). Hence two distinct real roots will be obtained.

Step 3

Exam Tip

(D=02-4(4)(-1)=16>0) है। इसलिए दो असमान वास्तविक मूल मिलेंगे।

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Question Easy Mathematics Quadratic Equations Nature of Roots Class 10 Level 37

समीकरण \(x^2+9=0\) के लिए सही विकल्प चुनिए।

Choose the correct option for \(x^2+9=0\).

Explanation opens after your attempt
Correct Answer

A. वास्तविक मूल नहींno real roots

Step 1

Concept

Here (D=02-4(1)(9)=-36<0). Therefore there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक मूल नहीं / no real roots. Here (D=02-4(1)(9)=-36<0). Therefore there are no real roots.

Step 3

Exam Tip

यहां (D=02-4(1)(9)=-36<0) है। इसलिए वास्तविक मूल नहीं हैं।

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Question Expert Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 24

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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Question Hard Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 24

यदि ग्राफ (y)-अक्ष को ((0,0)) पर छूता है तो शून्यकों के बारे में कौन सा निष्कर्ष सही है?

If a graph touches the (y)-axis at ((0,0)), which conclusion about zeroes is correct?

Explanation opens after your attempt
Correct Answer

A. (0) शून्यक है क्योंकि बिंदु (x)-अक्ष पर भी है(0) is a zero because the point is also on the (x)-axis

Step 1

Concept

The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 2

Why this answer is correct

The correct answer is A. (0) शून्यक है क्योंकि बिंदु (x)-अक्ष पर भी है / (0) is a zero because the point is also on the (x)-axis. The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 3

Exam Tip

मूल बिंदु दोनों अक्षों पर होता है इसलिए (p(0)=0) है। टिप: ((0,0)) को विशेष बिंदु मानें।

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Question Hard Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 23

यदि ग्राफ (y)-अक्ष को ((0,0)) पर काटता है, तो शून्यकों के बारे में कौन सा निष्कर्ष सही है?

If a graph cuts the (y)-axis at ((0,0)), which conclusion about zeroes is correct?

Explanation opens after your attempt
Correct Answer

A. (0) शून्यक है क्योंकि बिंदु (x)-अक्ष पर भी है(0) is a zero because the point is also on the (x)-axis

Step 1

Concept

The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 2

Why this answer is correct

The correct answer is A. (0) शून्यक है क्योंकि बिंदु (x)-अक्ष पर भी है / (0) is a zero because the point is also on the (x)-axis. The origin lies on both axes, so (p(0)=0). Tip: treat ((0,0)) as a special point.

Step 3

Exam Tip

मूल बिंदु दोनों अक्षों पर होता है, इसलिए (p(0)=0) है। टिप: ((0,0)) को विशेष बिंदु मानें।

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Question Medium Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 23

किसी आलेख पर (x=3) पर (p(x)=0) और (x=7) पर (p(x)=4) है। कौन सा कथन सही है?

On a graph (p(x)=0) at (x=3) and (p(x)=4) at (x=7). Which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (3) शून्यक है पर (7) नहीं(3) is a zero but (7) is not

Step 1

Concept

(p(3)=0) but (p(7)=4). Tip: a zero needs the function value exactly (0).

Step 2

Why this answer is correct

The correct answer is A. (3) शून्यक है पर (7) नहीं / (3) is a zero but (7) is not. (p(3)=0) but (p(7)=4). Tip: a zero needs the function value exactly (0).

Step 3

Exam Tip

(p(3)=0) है लेकिन (p(7)=4) है। टिप: शून्यक के लिए फलन मान ठीक (0) चाहिए।

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Question Medium Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 22

यदि परवलय (x)-अक्ष को नहीं काटता लेकिन (y)-अक्ष को ((0,-2)) पर काटता है, तो वास्तविक शून्यकों की संख्या क्या है?

If a parabola does not cut the (x)-axis but cuts the (y)-axis at ((0,-2)), what is the number of real zeroes?

Explanation opens after your attempt
Correct Answer

A. शून्यZero

Step 1

Concept

A (y)-axis intercept does not give a zero because (p(x)\neq0). Tip: meeting the (x)-axis is necessary for a zero.

Step 2

Why this answer is correct

The correct answer is A. शून्य / Zero. A (y)-axis intercept does not give a zero because (p(x)\neq0). Tip: meeting the (x)-axis is necessary for a zero.

Step 3

Exam Tip

(y)-अक्ष कटान शून्यक नहीं देता, क्योंकि (p(x)=0) नहीं है। टिप: शून्यक के लिए (x)-अक्ष से मिलना जरूरी है।

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Question Medium Mathematics Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 22

एक विद्यार्थी ने (y)-अक्ष कटान ((0,8)) को देखकर (8) को शून्यक माना। सही सुधार क्या है?

A student saw the (y)-axis intercept ((0,8)) and considered (8) as a zero. What is the correct correction?

Explanation opens after your attempt
Correct Answer

C. यह शून्यक नहीं बताता क्योंकि \(y\neq0\) हैIt does not show a zero because \(y\neq0\)

Step 1

Concept

For a zero, the point must lie on the (x)-axis. Tip: check (y=0) when identifying zeroes.

Step 2

Why this answer is correct

The correct answer is C. यह शून्यक नहीं बताता क्योंकि \(y\neq0\) है / It does not show a zero because \(y\neq0\). For a zero, the point must lie on the (x)-axis. Tip: check (y=0) when identifying zeroes.

Step 3

Exam Tip

शून्यक के लिए बिंदु (x)-अक्ष पर होना चाहिए। टिप: शून्यक पहचानते समय (y=0) जांचें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\sqrt{\frac{2}{9}}\) का सही प्रकार बताता है?

Which option correctly describes \(\sqrt{\frac{2}{9}}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय क्योंकि \(\sqrt{\frac{2}{9}}=\frac{\sqrt{2}}{3}\)Irrational because \(\sqrt{\frac{2}{9}}=\frac{\sqrt{2}}{3}\)

Step 1

Concept

\(\sqrt{\frac{2}{9}}=\frac{\sqrt{2}}{3}\).

Step 2

Why this answer is correct

\(\sqrt{2}\) is irrational and remains irrational after division by (3).

Step 3

Exam Tip

Check both numerator and denominator of the fraction. चरण 1: \(\sqrt{\frac{2}{9}}=\frac{\sqrt{2}}{3}\)। चरण 2: \(\sqrt{2}\) अपरिमेय है और (3) से भाग देने पर भी अपरिमेय रहता है। चरण 3: भिन्न के अंश और हर दोनों को जांचें।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

\(\sqrt{48}\) को सरल करने पर संख्या किस प्रकार की है?

After simplifying \(\sqrt{48}\) what type of number is it?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय क्योंकि \(\sqrt{48}=4\sqrt{3}\)Irrational because \(\sqrt{48}=4\sqrt{3}\)

Step 1

Concept

\(48=16\cdot 3\).

Step 2

Why this answer is correct

\(\sqrt{48}=4\sqrt{3}\) and \(\sqrt{3}\) is irrational.

Step 3

Exam Tip

The square root of an even number need not be rational. चरण 1: \(48=16\cdot 3\) है। चरण 2: \(\sqrt{48}=4\sqrt{3}\) और \(\sqrt{3}\) अपरिमेय है। चरण 3: सम संख्या का वर्गमूल परिमेय होगा यह जरूरी नहीं।

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Question Expert Mathematics Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प \(\sqrt{18}-\sqrt{8}\) का सही प्रकार बताता है?

Which option correctly describes \(\sqrt{18}-\sqrt{8}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय क्योंकि उत्तर \(\sqrt{2}\) हैIrrational because the answer is \(\sqrt{2}\)

Step 1

Concept

\(\sqrt{18}=3\sqrt{2}\) and \(\sqrt{8}=2\sqrt{2}\).

Step 2

Why this answer is correct

The difference is \(\sqrt{2}\) which is irrational.

Step 3

Exam Tip

Do not subtract the numbers inside square roots directly. चरण 1: \(\sqrt{18}=3\sqrt{2}\) और \(\sqrt{8}=2\sqrt{2}\)। चरण 2: अंतर \(\sqrt{2}\) है जो अपरिमेय है। चरण 3: वर्गमूल घटाते समय भीतर की संख्याओं को सीधे न घटाएं।

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Question Hard Mathematics Real Numbers 5: Irrational numbers Class 10 Level 14

कौन-सा विकल्प \(3-\sqrt{2}\) की प्रकृति सही बताता है?

Which option correctly describes the nature of \(3-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

B. अपरिमेय, क्योंकि परिमेय में से अपरिमेय घटा हैIrrational because an irrational is subtracted from a rational

Step 1

Concept

(3) is rational and \(\sqrt{2}\) is irrational.

Step 2

Why this answer is correct

A rational number minus an irrational number remains irrational.

Step 3

Exam Tip

Do not classify the whole expression by looking only at the rational part. चरण 1: (3) परिमेय है और \(\sqrt{2}\) अपरिमेय है। चरण 2: परिमेय संख्या में से अपरिमेय घटाने पर परिणाम अपरिमेय रहता है। चरण 3: केवल परिमेय पद देखकर पूरे व्यंजक को परिमेय न मानें।

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Question Expert Science Unit 2: World of Living Heredity and Evolution Class 10 Level 21

एक दंपति की चार बेटियाँ हैं। पाँचवें बच्चे का लड़का होने की संभावना के बारे में सही कथन क्या है?

A couple has four daughters. What is the correct statement about the chance that the fifth child will be a boy?

Explanation opens after your attempt
Correct Answer

B. हर बार संभावना फिर से लगभग आधी रहती हैEach time the chance is again about one half

Step 1

Concept

In each pregnancy, a sperm independently carries X or Y.

Step 2

Why this answer is correct

Previous births do not decide the next chance.

Step 3

Exam Tip

So the chance of a boy is again about one half. चरण 1: हर गर्भधारण में शुक्राणु स्वतंत्र रूप से एक्स या वाई ला सकता है। चरण 2: पहले जन्मे बच्चों से अगली संभावना तय नहीं होती। चरण 3: इसलिए पाँचवें बच्चे में लड़का होने की संभावना फिर लगभग आधी मानी जाती है।

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