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Class 11 Mathematics - Relations And Functions - Real valued functions, domain and range of these functions Easy Quiz

Level 33 • 50/50 questions • 40 seconds per question.

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फलन (f(x)=x+5) का डोमेन क्या है?

What is the domain of the function (f(x)=x+5)?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\)

Step 1

Concept

The linear function (f(x)=x+5) is defined for every real (x). In exams remember that a linear function usually has domain \(\mathbb{R}\).

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\). The linear function (f(x)=x+5) is defined for every real (x). In exams remember that a linear function usually has domain \(\mathbb{R}\).

Step 3

Exam Tip

रेखीय फलन (f(x)=x+5) हर वास्तविक (x) पर परिभाषित है। परीक्षा में रेखीय फलन का डोमेन सामान्यतः \(\mathbb{R}\) याद रखें।

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फलन (f(x)=x-2) की रेंज क्या है?

What is the range of the function (f(x)=x-2)?

Explanation opens after your attempt
Correct Answer

B. \([0,\infty\))

Step 1

Concept

For every real (x), \(x^2 \ge 0\). In exams remember that the square function has minimum value (0).

Step 2

Why this answer is correct

The correct answer is B. \([0,\infty\)). For every real (x), \(x^2 \ge 0\). In exams remember that the square function has minimum value (0).

Step 3

Exam Tip

किसी भी वास्तविक (x) के लिए \(x^2 \ge 0\) होता है। परीक्षा में वर्ग फलन की न्यूनतम वैल्यू (0) याद रखें।

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फलन (f(x)=\sqrt{x-2}) का डोमेन क्या है?

What is the domain of the function (f(x)=\sqrt{x-2})?

Explanation opens after your attempt
Correct Answer

A. \([2,\infty\))

Step 1

Concept

For a square root, \(x-2 \ge 0\), so \(x \ge 2\). In exams keep the expression under the square root \( \ge 0\).

Step 2

Why this answer is correct

The correct answer is A. \([2,\infty\)). For a square root, \(x-2 \ge 0\), so \(x \ge 2\). In exams keep the expression under the square root \( \ge 0\).

Step 3

Exam Tip

वर्गमूल के लिए \(x-2 \ge 0\) होना चाहिए इसलिए \(x \ge 2\)। परीक्षा में वर्गमूल के अंदर की राशि को \( \ge 0\) रखें।

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फलन (f(x)=\frac{1}{x-3}) के डोमेन से कौन सी वैल्यू हटेगी?

Which value is excluded from the domain of (f(x)=\frac{1}{x-3})?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The denominator must satisfy \(x-3 \ne 0\), so \(x \ne 3\). In exams never allow the denominator to become (0).

Step 2

Why this answer is correct

The correct answer is C. (3). The denominator must satisfy \(x-3 \ne 0\), so \(x \ne 3\). In exams never allow the denominator to become (0).

Step 3

Exam Tip

हर में \(x-3 \ne 0\) होना चाहिए इसलिए \(x \ne 3\)। परीक्षा में हर को कभी (0) न होने दें।

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फलन (f(x)=\sqrt{5-x}) का डोमेन क्या है?

What is the domain of the function (f(x)=\sqrt{5-x})?

Explanation opens after your attempt
Correct Answer

B. ( \(-\infty,5]\)

Step 1

Concept

For the square root, \(5-x \ge 0\), so \(x \le 5\). In exams handle the inequality sign carefully while solving.

Step 2

Why this answer is correct

The correct answer is B. ( \(-\infty,5]\). For the square root, \(5-x \ge 0\), so \(x \le 5\). In exams handle the inequality sign carefully while solving.

Step 3

Exam Tip

वर्गमूल के लिए \(5-x \ge 0\) इसलिए \(x \le 5\)। परीक्षा में असमानता हल करते समय चिन्ह ध्यान से बदलें।

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फलन (f(x)=x-2+1) की रेंज क्या है?

What is the range of the function (f(x)=x-2+1)?

Explanation opens after your attempt
Correct Answer

A. \([1,\infty\))

Step 1

Concept

Since \(x^2 \ge 0\), \(x^2+1 \ge 1\). In exams a vertical shift changes the range.

Step 2

Why this answer is correct

The correct answer is A. \([1,\infty\)). Since \(x^2 \ge 0\), \(x^2+1 \ge 1\). In exams a vertical shift changes the range.

Step 3

Exam Tip

क्योंकि \(x^2 \ge 0\) इसलिए \(x^2+1 \ge 1\)। परीक्षा में ऊपर या नीचे शिफ्ट से रेंज बदलती है।

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फलन (f(x)=|x-4|) का डोमेन क्या है?

What is the domain of (f(x)=|x-4|)?

Explanation opens after your attempt
Correct Answer

C. \(\mathbb{R}\)

Step 1

Concept

A modulus function is defined for every real (x). In exams modulus does not usually create a domain restriction.

Step 2

Why this answer is correct

The correct answer is C. \(\mathbb{R}\). A modulus function is defined for every real (x). In exams modulus does not usually create a domain restriction.

Step 3

Exam Tip

मापांक फलन हर वास्तविक (x) के लिए परिभाषित रहता है। परीक्षा में मापांक में डोमेन पर अलग रोक नहीं होती।

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फलन (f(x)=3x+2) की रेंज क्या है?

What is the range of (f(x)=3x+2)?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\)

Step 1

Concept

A linear function with non-zero slope can produce all real outputs. In exams (ax+b) has range \(\mathbb{R}\) when \(a \ne 0\).

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\). A linear function with non-zero slope can produce all real outputs. In exams (ax+b) has range \(\mathbb{R}\) when \(a \ne 0\).

Step 3

Exam Tip

अशून्य ढाल वाला रेखीय फलन सभी वास्तविक आउटपुट दे सकता है। परीक्षा में (ax+b) के लिए \(a \ne 0\) हो तो रेंज \(\mathbb{R}\) होती है।

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फलन (f(x)=7) की रेंज क्या है?

What is the range of (f(x)=7)?

Explanation opens after your attempt
Correct Answer

B. ({7})

Step 1

Concept

A constant function always gives the same output (7). In exams the range of a constant function is a singleton set.

Step 2

Why this answer is correct

The correct answer is B. ({7}). A constant function always gives the same output (7). In exams the range of a constant function is a singleton set.

Step 3

Exam Tip

स्थिर फलन हमेशा एक ही आउटपुट (7) देता है। परीक्षा में स्थिर फलन की रेंज एकल समुच्चय होती है।

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फलन (f(x)=\frac{2}{x+4}) का डोमेन क्या है?

What is the domain of (f(x)=\frac{2}{x+4})?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\setminus{-4}\)

Step 1

Concept

The denominator needs \(x+4 \ne 0\), so \(x \ne -4\). In exams remove the value that makes the denominator zero.

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\setminus{-4}\). The denominator needs \(x+4 \ne 0\), so \(x \ne -4\). In exams remove the value that makes the denominator zero.

Step 3

Exam Tip

हर में \(x+4 \ne 0\) इसलिए \(x \ne -4\)। परीक्षा में हर को शून्य बनाने वाली वैल्यू हटाएं।

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फलन (f(x)=\sqrt{x+6}) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{x+6})?

Explanation opens after your attempt
Correct Answer

A. \([-6,\infty\))

Step 1

Concept

For the square root, \(x+6 \ge 0\), so \(x \ge -6\). In exams the endpoint is included because square root is defined at (0).

Step 2

Why this answer is correct

The correct answer is A. \([-6,\infty\)). For the square root, \(x+6 \ge 0\), so \(x \ge -6\). In exams the endpoint is included because square root is defined at (0).

Step 3

Exam Tip

वर्गमूल के लिए \(x+6 \ge 0\) इसलिए \(x \ge -6\)। परीक्षा में सीमा बिंदु शामिल होगा क्योंकि वर्गमूल (0) पर परिभाषित है।

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फलन (f(x)=\sqrt{x}+3) की रेंज क्या है?

What is the range of (f(x)=\sqrt{x}+3)?

Explanation opens after your attempt
Correct Answer

B. \([3,\infty\))

Step 1

Concept

Since \(\sqrt{x} \ge 0\), \(\sqrt{x}+3 \ge 3\). In exams adding (3) shifts the minimum value to (3).

Step 2

Why this answer is correct

The correct answer is B. \([3,\infty\)). Since \(\sqrt{x} \ge 0\), \(\sqrt{x}+3 \ge 3\). In exams adding (3) shifts the minimum value to (3).

Step 3

Exam Tip

क्योंकि \(\sqrt{x} \ge 0\) इसलिए \(\sqrt{x}+3 \ge 3\)। परीक्षा में ऊपर (3) जोड़ने से न्यूनतम वैल्यू (3) हो जाती है।

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फलन (f(x)=\frac{1}{x-2+1}) का डोमेन क्या है?

What is the domain of (f(x)=\frac{1}{x-2+1})?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\)

Step 1

Concept

The denominator \(x^2+1\) is never (0) because \(x^2 \ge 0\). In exams check the minimum value of the denominator.

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\). The denominator \(x^2+1\) is never (0) because \(x^2 \ge 0\). In exams check the minimum value of the denominator.

Step 3

Exam Tip

हर \(x^2+1\) कभी (0) नहीं होता क्योंकि \(x^2 \ge 0\)। परीक्षा में हर की न्यूनतम वैल्यू जांचें।

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यदि \(f:\mathbb{R}\to\mathbb{R}\) और (f(x)=2x-1) है तो (f(3)) क्या होगा?

If \(f:\mathbb{R}\to\mathbb{R}\) and (f(x)=2x-1), what is (f(3))?

Explanation opens after your attempt
Correct Answer

B. (5)

Step 1

Concept

(f(3)=2(3)-1=5). In exams substitute the given (x) directly into the rule.

Step 2

Why this answer is correct

The correct answer is B. (5). (f(3)=2(3)-1=5). In exams substitute the given (x) directly into the rule.

Step 3

Exam Tip

(f(3)=2(3)-1=5) होता है। परीक्षा में दिए गए (x) को सीधे नियम में रखें।

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यदि (f(x)=x-2+2) और डोमेन ({0,1,2}) है तो रेंज क्या होगी?

If (f(x)=x-2+2) and the domain is ({0,1,2}), what is the range?

Explanation opens after your attempt
Correct Answer

B. ({2,3,6})

Step 1

Concept

For inputs (0,1,2), the outputs are (2,3,6). In exams, for a finite domain, calculate the value for each input.

Step 2

Why this answer is correct

The correct answer is B. ({2,3,6}). For inputs (0,1,2), the outputs are (2,3,6). In exams, for a finite domain, calculate the value for each input.

Step 3

Exam Tip

इनपुट (0,1,2) पर आउटपुट (2,3,6) मिलते हैं। परीक्षा में सीमित डोमेन हो तो हर इनपुट की वैल्यू निकालें।

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फलन (f(x)=\frac{x}{x-2}) के डोमेन में कौन सा (x) नहीं हो सकता?

Which (x) cannot be in the domain of (f(x)=\frac{x}{x-2})?

Explanation opens after your attempt
Correct Answer

C. (2)

Step 1

Concept

The denominator (x-2) must not be (0), so \(x \ne 2\). In exams check the denominator first in fractional functions.

Step 2

Why this answer is correct

The correct answer is C. (2). The denominator (x-2) must not be (0), so \(x \ne 2\). In exams check the denominator first in fractional functions.

Step 3

Exam Tip

हर (x-2) को (0) नहीं होना चाहिए इसलिए \(x \ne 2\)। परीक्षा में भिन्न वाले फलन में हर पहले जांचें।

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फलन (f(x)=\sqrt{2x+8}) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{2x+8})?

Explanation opens after your attempt
Correct Answer

A. \([-4,\infty\))

Step 1

Concept

For the square root, \(2x+8 \ge 0\), so \(x \ge -4\). In exams first put (2x+8) as \( \ge 0\).

Step 2

Why this answer is correct

The correct answer is A. \([-4,\infty\)). For the square root, \(2x+8 \ge 0\), so \(x \ge -4\). In exams first put (2x+8) as \( \ge 0\).

Step 3

Exam Tip

वर्गमूल के लिए \(2x+8 \ge 0\) इसलिए \(x \ge -4\)। परीक्षा में पहले (2x+8) को \( \ge 0\) रखें।

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फलन (f(x)=5-x) की रेंज क्या है?

What is the range of (f(x)=5-x)?

Explanation opens after your attempt
Correct Answer

C. \(\mathbb{R}\)

Step 1

Concept

(5-x) is a linear function with non-zero slope, so it can give all real values. In exams a negative slope still gives range \(\mathbb{R}\).

Step 2

Why this answer is correct

The correct answer is C. \(\mathbb{R}\). (5-x) is a linear function with non-zero slope, so it can give all real values. In exams a negative slope still gives range \(\mathbb{R}\).

Step 3

Exam Tip

(5-x) एक अशून्य ढाल वाला रेखीय फलन है इसलिए सभी वास्तविक वैल्यू दे सकता है। परीक्षा में ऋणात्मक ढाल से भी रेंज \(\mathbb{R}\) रहती है।

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फलन (f(x)=|x-2|+1) की रेंज क्या है?

What is the range of (f(x)=|x-2|+1)?

Explanation opens after your attempt
Correct Answer

A. \([1,\infty\))

Step 1

Concept

Since \(|x-2| \ge 0\), \(|x-2|+1 \ge 1\). In exams check the minimum of modulus where it becomes zero.

Step 2

Why this answer is correct

The correct answer is A. \([1,\infty\)). Since \(|x-2| \ge 0\), \(|x-2|+1 \ge 1\). In exams check the minimum of modulus where it becomes zero.

Step 3

Exam Tip

क्योंकि \(|x-2| \ge 0\) इसलिए \(|x-2|+1 \ge 1\)। परीक्षा में मापांक की न्यूनतम वैल्यू उसके शून्य पर देखें।

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फलन (f(x)=\frac{1}{x-2-9}) का डोमेन क्या है?

What is the domain of (f(x)=\frac{1}{x-2-9})?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\setminus{-3,3}\)

Step 1

Concept

The denominator needs \(x^2-9 \ne 0\), so \(x \ne -3\) and \(x \ne 3\). In exams factor \(a^2-b^2\) to check.

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\setminus{-3,3}\). The denominator needs \(x^2-9 \ne 0\), so \(x \ne -3\) and \(x \ne 3\). In exams factor \(a^2-b^2\) to check.

Step 3

Exam Tip

हर \(x^2-9 \ne 0\) इसलिए \(x \ne -3\) और \(x \ne 3\)। परीक्षा में \(a^2-b^2\) को गुणनखंड करके जांचें।

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फलन (f(x)=\sqrt{10-2x}) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{10-2x})?

Explanation opens after your attempt
Correct Answer

A. ( \(-\infty,5]\)

Step 1

Concept

For the square root, \(10-2x \ge 0\), so \(x \le 5\). In exams dividing by a negative coefficient reverses the inequality.

Step 2

Why this answer is correct

The correct answer is A. ( \(-\infty,5]\). For the square root, \(10-2x \ge 0\), so \(x \le 5\). In exams dividing by a negative coefficient reverses the inequality.

Step 3

Exam Tip

वर्गमूल के लिए \(10-2x \ge 0\) इसलिए \(x \le 5\)। परीक्षा में ऋणात्मक गुणांक से भाग देने पर असमानता बदलती है।

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फलन (f(x)=\frac{1}{x}) की रेंज क्या है?

What is the range of (f(x)=\frac{1}{x})?

Explanation opens after your attempt
Correct Answer

B. \(\mathbb{R}\setminus{0}\)

Step 1

Concept

\(\frac{1}{x}\) can never become (0). In exams the reciprocal function range excludes (0).

Step 2

Why this answer is correct

The correct answer is B. \(\mathbb{R}\setminus{0}\). \(\frac{1}{x}\) can never become (0). In exams the reciprocal function range excludes (0).

Step 3

Exam Tip

\(\frac{1}{x}\) कभी (0) नहीं बनता। परीक्षा में reciprocal function की रेंज से (0) हटता है।

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यदि (f(x)=4x) और डोमेन ({-1,0,2}) है तो रेंज क्या है?

If (f(x)=4x) and the domain is ({-1,0,2}), what is the range?

Explanation opens after your attempt
Correct Answer

A. ({-4,0,8})

Step 1

Concept

For inputs (-1,0,2), the outputs are (-4,0,8). In exams apply the function to every member of the domain.

Step 2

Why this answer is correct

The correct answer is A. ({-4,0,8}). For inputs (-1,0,2), the outputs are (-4,0,8). In exams apply the function to every member of the domain.

Step 3

Exam Tip

इनपुट (-1,0,2) पर आउटपुट (-4,0,8) हैं। परीक्षा में डोमेन के हर सदस्य पर फलन लगाएं।

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फलन (f(x)=\sqrt{x-2}) की रेंज क्या है?

What is the range of (f(x)=\sqrt{x-2})?

Explanation opens after your attempt
Correct Answer

B. \([0,\infty\))

Step 1

Concept

\(\sqrt{x^2}=|x|\), so the output is never negative. In exams treat \(\sqrt{x^2}\) as (|x|), not simply (x).

Step 2

Why this answer is correct

The correct answer is B. \([0,\infty\)). \(\sqrt{x^2}=|x|\), so the output is never negative. In exams treat \(\sqrt{x^2}\) as (|x|), not simply (x).

Step 3

Exam Tip

\(\sqrt{x^2}=|x|\) होता है इसलिए आउटपुट कभी ऋणात्मक नहीं होगा। परीक्षा में \(\sqrt{x^2}\) को (x) नहीं बल्कि (|x|) मानें।

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फलन (f(x)=\frac{1}{\sqrt{4-x}}) का डोमेन क्या है?

What is the domain of (f(x)=\frac{1}{\sqrt{4-x}})?

Explanation opens after your attempt
Correct Answer

A. ( \(-\infty,4\))

Step 1

Concept

The square root is in the denominator, so (4-x>0), giving (x<4). In exams do not include equality for a denominator square root.

Step 2

Why this answer is correct

The correct answer is A. ( \(-\infty,4\)). The square root is in the denominator, so (4-x>0), giving (x<4). In exams do not include equality for a denominator square root.

Step 3

Exam Tip

हर में वर्गमूल है इसलिए (4-x>0) चाहिए और (x<4)। परीक्षा में हर वाले वर्गमूल में बराबरी शामिल न करें।

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फलन (f(x)=\sqrt{x-7}+2) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{x-7}+2)?

Explanation opens after your attempt
Correct Answer

A. \([7,\infty\))

Step 1

Concept

For the square root, \(x-7 \ge 0\), so \(x \ge 7\). In exams the outside (+2) does not change the domain.

Step 2

Why this answer is correct

The correct answer is A. \([7,\infty\)). For the square root, \(x-7 \ge 0\), so \(x \ge 7\). In exams the outside (+2) does not change the domain.

Step 3

Exam Tip

वर्गमूल के लिए \(x-7 \ge 0\) इसलिए \(x \ge 7\)। परीक्षा में बाहर का (+2) डोमेन नहीं बदलता।

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फलन (f(x)=\sqrt{x-7}+2) की रेंज क्या है?

What is the range of (f(x)=\sqrt{x-7}+2)?

Explanation opens after your attempt
Correct Answer

B. \([2,\infty\))

Step 1

Concept

The minimum value of \(\sqrt{x-7}\) is (0), so (f(x)\ge 2). In exams the outside added (2) shifts the range upward.

Step 2

Why this answer is correct

The correct answer is B. \([2,\infty\)). The minimum value of \(\sqrt{x-7}\) is (0), so (f(x)\ge 2). In exams the outside added (2) shifts the range upward.

Step 3

Exam Tip

\(\sqrt{x-7}\) की न्यूनतम वैल्यू (0) है इसलिए (f(x)\ge 2)। परीक्षा में बाहर जोड़ा गया (2) रेंज को ऊपर शिफ्ट करता है।

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फलन (f(x)=\frac{x+1}{x+1}) का डोमेन क्या है?

What is the domain of (f(x)=\frac{x+1}{x+1})?

Explanation opens after your attempt
Correct Answer

B. \(\mathbb{R}\setminus{-1}\)

Step 1

Concept

The original function has denominator (x+1), so (x=-1) is excluded. In exams remember the restriction from the original denominator before cancelling.

Step 2

Why this answer is correct

The correct answer is B. \(\mathbb{R}\setminus{-1}\). The original function has denominator (x+1), so (x=-1) is excluded. In exams remember the restriction from the original denominator before cancelling.

Step 3

Exam Tip

मूल फलन में हर (x+1) है इसलिए (x=-1) हटेगा। परीक्षा में काटने से पहले मूल हर की रोक याद रखें।

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फलन (f(x)=2|x|+3) की रेंज क्या है?

What is the range of (f(x)=2|x|+3)?

Explanation opens after your attempt
Correct Answer

A. \([3,\infty\))

Step 1

Concept

Since \(|x| \ge 0\), \(2|x|+3 \ge 3\). In exams consider both the positive multiplier and the upward shift.

Step 2

Why this answer is correct

The correct answer is A. \([3,\infty\)). Since \(|x| \ge 0\), \(2|x|+3 \ge 3\). In exams consider both the positive multiplier and the upward shift.

Step 3

Exam Tip

क्योंकि \(|x| \ge 0\) इसलिए \(2|x|+3 \ge 3\)। परीक्षा में धनात्मक गुणक और ऊपर शिफ्ट दोनों देखें।

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फलन (f(x)=\sqrt{3x-12}) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{3x-12})?

Explanation opens after your attempt
Correct Answer

A. \([4,\infty\))

Step 1

Concept

For the square root, \(3x-12 \ge 0\), so \(x \ge 4\). In exams solve the linear inequality carefully.

Step 2

Why this answer is correct

The correct answer is A. \([4,\infty\)). For the square root, \(3x-12 \ge 0\), so \(x \ge 4\). In exams solve the linear inequality carefully.

Step 3

Exam Tip

वर्गमूल के लिए \(3x-12 \ge 0\) इसलिए \(x \ge 4\)। परीक्षा में रैखिक असमानता को सावधानी से हल करें।

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फलन (f(x)=9-(x-1)2) की रेंज क्या है?

What is the range of (f(x)=9-(x-1)2)?

Explanation opens after your attempt
Correct Answer

B. ( \(-\infty,9]\)

Step 1

Concept

Since ((x-1)2 \ge 0), (9-(x-1)2 \le 9). In exams identify the maximum value of a downward parabola.

Step 2

Why this answer is correct

The correct answer is B. ( \(-\infty,9]\). Since ((x-1)2 \ge 0), (9-(x-1)2 \le 9). In exams identify the maximum value of a downward parabola.

Step 3

Exam Tip

क्योंकि ((x-1)2 \ge 0) इसलिए (9-(x-1)2 \le 9)। परीक्षा में उल्टे परवलय की अधिकतम वैल्यू पहचानें।

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यदि (f(x)=x+2) और डोमेन ([0,3]) है तो रेंज क्या होगी?

If (f(x)=x+2) and the domain is ([0,3]), what is the range?

Explanation opens after your attempt
Correct Answer

B. ([2,5])

Step 1

Concept

When \(x\in[0,3]\), \(x+2\in[2,5]\). In exams evaluate the function at both endpoints of the interval.

Step 2

Why this answer is correct

The correct answer is B. ([2,5]). When \(x\in[0,3]\), \(x+2\in[2,5]\). In exams evaluate the function at both endpoints of the interval.

Step 3

Exam Tip

जब \(x\in[0,3]\), तब \(x+2\in[2,5]\)। परीक्षा में अंतराल के दोनों सिरों पर फलन की वैल्यू देखें।

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यदि (f(x)=2x) और डोमेन ((-1,4)) है तो रेंज क्या है?

If (f(x)=2x) and the domain is ((-1,4)), what is the range?

Explanation opens after your attempt
Correct Answer

A. ((-2,8))

Step 1

Concept

The positive multiplier (2) changes the open interval ((-1,4)) to ((-2,8)). In exams keep open endpoints open.

Step 2

Why this answer is correct

The correct answer is A. ((-2,8)). The positive multiplier (2) changes the open interval ((-1,4)) to ((-2,8)). In exams keep open endpoints open.

Step 3

Exam Tip

धनात्मक गुणक (2) खुले अंतराल ((-1,4)) को ((-2,8)) में बदलता है। परीक्षा में खुले सिरों को खुला ही रखें।

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फलन (f(x)=\frac{1}{x-5}+2) का डोमेन क्या है?

What is the domain of (f(x)=\frac{1}{x-5}+2)?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\setminus{5}\)

Step 1

Concept

The denominator (x-5) cannot be zero, so \(x \ne 5\). In exams the outside added (2) does not change the domain.

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\setminus{5}\). The denominator (x-5) cannot be zero, so \(x \ne 5\). In exams the outside added (2) does not change the domain.

Step 3

Exam Tip

हर (x-5) शून्य नहीं हो सकता इसलिए \(x \ne 5\)। परीक्षा में बाहर जोड़ा गया (2) डोमेन नहीं बदलता।

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फलन (f(x)=\frac{1}{x-5}+2) की रेंज क्या है?

What is the range of (f(x)=\frac{1}{x-5}+2)?

Explanation opens after your attempt
Correct Answer

B. \(\mathbb{R}\setminus{2}\)

Step 1

Concept

\(\frac{1}{x-5}\) is never (0), so the output cannot be (2). In exams a vertical shift of a reciprocal changes the excluded range value.

Step 2

Why this answer is correct

The correct answer is B. \(\mathbb{R}\setminus{2}\). \(\frac{1}{x-5}\) is never (0), so the output cannot be (2). In exams a vertical shift of a reciprocal changes the excluded range value.

Step 3

Exam Tip

\(\frac{1}{x-5}\) कभी (0) नहीं होता इसलिए आउटपुट (2) नहीं बनेगा। परीक्षा में reciprocal के vertical shift से हटने वाली रेंज वैल्यू बदलती है।

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फलन (f(x)=\sqrt{x-2+4}) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{x-2+4})?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\)

Step 1

Concept

Because \(x^2+4>0\) for every real (x). In exams if the square root expression is always positive, the domain is \(\mathbb{R}\).

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\). Because \(x^2+4>0\) for every real (x). In exams if the square root expression is always positive, the domain is \(\mathbb{R}\).

Step 3

Exam Tip

क्योंकि \(x^2+4>0\) हर वास्तविक (x) के लिए है। परीक्षा में वर्गमूल के अंदर की राशि हमेशा धनात्मक हो तो डोमेन \(\mathbb{R}\) होता है।

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फलन (f(x)=\sqrt{x-2+4}) की रेंज क्या है?

What is the range of (f(x)=\sqrt{x-2+4})?

Explanation opens after your attempt
Correct Answer

B. \([2,\infty\))

Step 1

Concept

The minimum value of \(x^2+4\) is (4), so \(\sqrt{x^2+4}\ge 2\). In exams first find the minimum value inside.

Step 2

Why this answer is correct

The correct answer is B. \([2,\infty\)). The minimum value of \(x^2+4\) is (4), so \(\sqrt{x^2+4}\ge 2\). In exams first find the minimum value inside.

Step 3

Exam Tip

\(x^2+4\) की न्यूनतम वैल्यू (4) है इसलिए \(\sqrt{x^2+4}\ge 2\)। परीक्षा में पहले अंदर की न्यूनतम वैल्यू निकालें।

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किस फलन का डोमेन \(\mathbb{R}\setminus{0}\) है?

Which function has domain \(\mathbb{R}\setminus{0}\)?

Explanation opens after your attempt
Correct Answer

B. (f(x)=\frac{1}{x})

Step 1

Concept

In \(\frac{1}{x}\), the denominator is (x), so (x=0) is not allowed. In exams do not let the denominator become zero.

Step 2

Why this answer is correct

The correct answer is B. (f(x)=\frac{1}{x}). In \(\frac{1}{x}\), the denominator is (x), so (x=0) is not allowed. In exams do not let the denominator become zero.

Step 3

Exam Tip

\(\frac{1}{x}\) में हर (x) है इसलिए (x=0) नहीं चलेगा। परीक्षा में हर में आने वाली वैल्यू को शून्य न बनने दें।

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किस फलन की रेंज \([0,\infty\)) है?

Which function has range \([0,\infty\))?

Explanation opens after your attempt
Correct Answer

B. (f(x)=x-2)

Step 1

Concept

\(x^2\) is never negative and can take all values from (0) upward. In exams remember the range of the square function as \([0,\infty\)).

Step 2

Why this answer is correct

The correct answer is B. (f(x)=x-2). \(x^2\) is never negative and can take all values from (0) upward. In exams remember the range of the square function as \([0,\infty\)).

Step 3

Exam Tip

\(x^2\) कभी ऋणात्मक नहीं होता और (0) से ऊपर सभी वैल्यू ले सकता है। परीक्षा में वर्ग फलन की रेंज \([0,\infty\)) याद रखें।

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यदि (f(x)=\sqrt{x}) है तो (f(16)) क्या है?

If (f(x)=\sqrt{x}), what is (f(16))?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

(f(16)=\sqrt{16}=4). In exams take the principal positive value of the square root.

Step 2

Why this answer is correct

The correct answer is B. (4). (f(16)=\sqrt{16}=4). In exams take the principal positive value of the square root.

Step 3

Exam Tip

(f(16)=\sqrt{16}=4) होता है। परीक्षा में वर्गमूल की मुख्य धनात्मक वैल्यू लें।

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यदि (f(x)=|x+5|) है तो (f(-8)) क्या है?

If (f(x)=|x+5|), what is (f(-8))?

Explanation opens after your attempt
Correct Answer

A. (3)

Step 1

Concept

(f(-8)=|-8+5|=|-3|=3). In exams the value of modulus is never negative.

Step 2

Why this answer is correct

The correct answer is A. (3). (f(-8)=|-8+5|=|-3|=3). In exams the value of modulus is never negative.

Step 3

Exam Tip

(f(-8)=|-8+5|=|-3|=3) होता है। परीक्षा में मापांक का उत्तर कभी ऋणात्मक नहीं होता।

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फलन (f(x)=\sqrt{x-1}+\sqrt{6-x}) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{x-1}+\sqrt{6-x})?

Explanation opens after your attempt
Correct Answer

A. ([1,6])

Step 1

Concept

The two conditions \(x-1\ge 0\) and \(6-x\ge 0\) together give \(1\le x\le 6\). In exams take the intersection of conditions for two square roots.

Step 2

Why this answer is correct

The correct answer is A. ([1,6]). The two conditions \(x-1\ge 0\) and \(6-x\ge 0\) together give \(1\le x\le 6\). In exams take the intersection of conditions for two square roots.

Step 3

Exam Tip

दोनों शर्तें \(x-1\ge 0\) और \(6-x\ge 0\) मिलकर \(1\le x\le 6\) देती हैं। परीक्षा में दो वर्गमूल हों तो शर्तों का प्रतिच्छेद लें।

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फलन (f(x)=\frac{1}{(x-1)(x+2)}) का डोमेन क्या है?

What is the domain of (f(x)=\frac{1}{(x-1)(x+2)})?

Explanation opens after your attempt
Correct Answer

A. \(\mathbb{R}\setminus{1,-2}\)

Step 1

Concept

The denominator becomes (0) when (x=1) or (x=-2). In exams set each denominator factor separately equal to zero.

Step 2

Why this answer is correct

The correct answer is A. \(\mathbb{R}\setminus{1,-2}\). The denominator becomes (0) when (x=1) or (x=-2). In exams set each denominator factor separately equal to zero.

Step 3

Exam Tip

हर (0) तब होगा जब (x=1) या (x=-2)। परीक्षा में हर के हर गुणनखंड को अलग से शून्य रखें।

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फलन (f(x)=3-(x+2)2) की अधिकतम वैल्यू क्या है?

What is the maximum value of (f(x)=3-(x+2)2)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

Since ((x+2)2\ge 0), (3-(x+2)2\le 3). In exams the maximum occurs when the squared part is (0).

Step 2

Why this answer is correct

The correct answer is C. (3). Since ((x+2)2\ge 0), (3-(x+2)2\le 3). In exams the maximum occurs when the squared part is (0).

Step 3

Exam Tip

क्योंकि ((x+2)2\ge 0), इसलिए (3-(x+2)2\le 3)। परीक्षा में अधिकतम तब मिलता है जब वर्ग वाला भाग (0) हो।

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फलन (f(x)=(x-4)2+6) की न्यूनतम वैल्यू क्या है?

What is the minimum value of (f(x)=(x-4)2+6)?

Explanation opens after your attempt
Correct Answer

B. (6)

Step 1

Concept

Since ((x-4)2\ge 0), the minimum value is (6). In exams set the squared part to (0) to get the minimum value.

Step 2

Why this answer is correct

The correct answer is B. (6). Since ((x-4)2\ge 0), the minimum value is (6). In exams set the squared part to (0) to get the minimum value.

Step 3

Exam Tip

क्योंकि ((x-4)2\ge 0), इसलिए न्यूनतम वैल्यू (6) है। परीक्षा में वर्ग वाला भाग (0) करके न्यूनतम वैल्यू पाएं।

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फलन (f(x)=\sqrt{1-x-2}) का डोमेन क्या है?

What is the domain of (f(x)=\sqrt{1-x-2})?

Explanation opens after your attempt
Correct Answer

A. ([-1,1])

Step 1

Concept

For the square root, \(1-x^2\ge 0\), so \(x^2\le 1\) and \(-1\le x\le 1\). In exams \(x^2\le a^2\) gives a closed interval.

Step 2

Why this answer is correct

The correct answer is A. ([-1,1]). For the square root, \(1-x^2\ge 0\), so \(x^2\le 1\) and \(-1\le x\le 1\). In exams \(x^2\le a^2\) gives a closed interval.

Step 3

Exam Tip

वर्गमूल के लिए \(1-x^2\ge 0\) इसलिए \(x^2\le 1\) और \(-1\le x\le 1\)। परीक्षा में \(x^2\le a^2\) से बंद अंतराल मिलता है।

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फलन (f(x)=\sqrt{9-x-2}) की रेंज क्या है?

What is the range of (f(x)=\sqrt{9-x-2})?

Explanation opens after your attempt
Correct Answer

A. ([0,3])

Step 1

Concept

Since \(0\le 9-x^2\le 9\), we get \(0\le \sqrt{9-x^2}\le 3\). In exams first check the maximum and minimum values inside.

Step 2

Why this answer is correct

The correct answer is A. ([0,3]). Since \(0\le 9-x^2\le 9\), we get \(0\le \sqrt{9-x^2}\le 3\). In exams first check the maximum and minimum values inside.

Step 3

Exam Tip

क्योंकि \(0\le 9-x^2\le 9\), इसलिए \(0\le \sqrt{9-x^2}\le 3\)। परीक्षा में पहले अंदर की अधिकतम और न्यूनतम वैल्यू देखें।

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फलन (f(x)=\frac{1}{x-2+4}) की रेंज क्या है?

What is the range of (f(x)=\frac{1}{x-2+4})?

Explanation opens after your attempt
Correct Answer

A. ( \(0,\frac{1}{4}]\)

Step 1

Concept

The denominator \(x^2+4\) has minimum value (4), so the maximum output is \(\frac{1}{4}\) and (0) is not reached. In exams (0) is often not included in reciprocal ranges.

Step 2

Why this answer is correct

The correct answer is A. ( \(0,\frac{1}{4}]\). The denominator \(x^2+4\) has minimum value (4), so the maximum output is \(\frac{1}{4}\) and (0) is not reached. In exams (0) is often not included in reciprocal ranges.

Step 3

Exam Tip

हर \(x^2+4\) की न्यूनतम वैल्यू (4) है, इसलिए अधिकतम आउटपुट \(\frac{1}{4}\) है और (0) नहीं मिलता। परीक्षा में reciprocal की रेंज में (0) अक्सर शामिल नहीं होता।

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फलन (f(x)=\sqrt{x-2}+\sqrt{8-x}) के डोमेन के लिए सही शर्त क्या है?

Which condition is correct for the domain of (f(x)=\sqrt{x-2}+\sqrt{8-x})?

Explanation opens after your attempt
Correct Answer

A. \(2\le x\le 8\)

Step 1

Concept

Both square roots need \(x-2\ge 0\) and \(8-x\ge 0\), so \(2\le x\le 8\). In exams take the intersection of conditions for the combined domain.

Step 2

Why this answer is correct

The correct answer is A. \(2\le x\le 8\). Both square roots need \(x-2\ge 0\) and \(8-x\ge 0\), so \(2\le x\le 8\). In exams take the intersection of conditions for the combined domain.

Step 3

Exam Tip

दोनों वर्गमूलों के लिए \(x-2\ge 0\) और \(8-x\ge 0\) चाहिए, इसलिए \(2\le x\le 8\)। परीक्षा में संयुक्त डोमेन के लिए शर्तों का प्रतिच्छेद लें।

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फलन (f(x)=\frac{\sqrt{x+2}}{x-3}) का डोमेन क्या है?

What is the domain of (f(x)=\frac{\sqrt{x+2}}{x-3})?

Explanation opens after your attempt
Correct Answer

A. \([-2,\infty\)\setminus{3})

Step 1

Concept

The square root needs \(x+2\ge 0\) and the denominator needs \(x-3\ne 0\). So \(x\ge -2\) and \(x\ne 3\); in exams take the intersection of all conditions.

Step 2

Why this answer is correct

The correct answer is A. \([-2,\infty\)\setminus{3}). The square root needs \(x+2\ge 0\) and the denominator needs \(x-3\ne 0\). So \(x\ge -2\) and \(x\ne 3\); in exams take the intersection of all conditions.

Step 3

Exam Tip

वर्गमूल के लिए \(x+2\ge 0\) और हर के लिए \(x-3\ne 0\) चाहिए। इसलिए \(x\ge -2\) और \(x\ne 3\); परीक्षा में सभी शर्तों का प्रतिच्छेद लें।

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FAQs

Class 11 Mathematics Quiz FAQs

How many questions are in this quiz?

This level is designed for 50 active questions. Currently 50 questions are available for the selected class and difficulty.

Is there a timer in this quiz?

Yes, the timer uses 40 seconds per question for Easy difficulty and shows the total remaining time on the page.

Can I open each question separately?

Yes, every question has its own SEO-friendly page with answer, explanation and related practice links.