Class 11 Mathematics - Relations And Functions - Functions as a special kind of relation Medium Quiz

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यदि \(A=\{-1,0,1,2\}\) और \(B=\{0,1,4\}\) हों, तथा (f(x)=x-2) हो, तो (f) का परिसर क्या है?

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

Explanation opens after your attempt
Correct Answer

A. ({0,1,4})

Step 1

Concept

(f(-1)=1), (f(0)=0), (f(1)=1), and (f(2)=4), so the range is ({0,1,4}). In exams, write repeated images only once.

Step 2

Why this answer is correct

The correct answer is A. ({0,1,4}). (f(-1)=1), (f(0)=0), (f(1)=1), and (f(2)=4), so the range is ({0,1,4}). In exams, write repeated images only once.

Step 3

Exam Tip

(f(-1)=1), (f(0)=0), (f(1)=1) और (f(2)=4), इसलिए परिसर ({0,1,4}) है। परीक्षा में दोहराई छवि को एक बार लिखें।

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यदि \(A=\{1,2,3,4\}\) और \(B=\{2,3,4,5\}\) हों, तो संबंध \(R=\{(1,2),(2,3),(3,4),(4,5)\}\) किस नियम को दर्शाता है?

If \(A=\{1,2,3,4\}\) and \(B=\{2,3,4,5\}\), which rule is represented by the relation \(R=\{(1,2),(2,3),(3,4),(4,5)\}\)?

Explanation opens after your attempt
Correct Answer

A. (f(x)=x+1)

Step 1

Concept

In every pair, the second component is (1) more than the first. In exams, test one common pattern on all pairs.

Step 2

Why this answer is correct

The correct answer is A. (f(x)=x+1). In every pair, the second component is (1) more than the first. In exams, test one common pattern on all pairs.

Step 3

Exam Tip

हर युग्म में दूसरा घटक पहले घटक से (1) अधिक है। परीक्षा में नियम पहचानने के लिए सभी युग्मों पर एक ही पैटर्न जांचें।

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यदि \(A=\{0,1,2\}\) और \(B=\{1,2,3,4\}\) हों, तथा (f(x)=x+2) हो, तो कौन-सा क्रमित युग्म (f) में नहीं होगा?

If \(A=\{0,1,2\}\) and \(B=\{1,2,3,4\}\), and (f(x)=x+2), which ordered pair will not be in (f)?

Explanation opens after your attempt
Correct Answer

D. ((2,3))

Step 1

Concept

(f(2)=2+2=4), so ((2,3)) will not be in this function. In exams, match each pair with the rule.

Step 2

Why this answer is correct

The correct answer is D. ((2,3)). (f(2)=2+2=4), so ((2,3)) will not be in this function. In exams, match each pair with the rule.

Step 3

Exam Tip

(f(2)=2+2=4), इसलिए ((2,3)) इस फलन में नहीं होगा। परीक्षा में हर युग्म को नियम से मिलाएं।

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यदि \(A=\{a,b,c\}\) और \(B=\{1,2\}\) हों, तो (A) से (B) में कुल फलनों की संख्या कितनी है?

If \(A=\{a,b,c\}\) and \(B=\{1,2\}\), how many functions are there from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(2^3=8\)

Step 1

Concept

Each element of (A) has (2) choices in (B), so total functions are \(2^3=8\). In exams, use (n(B)^{n(A)}).

Step 2

Why this answer is correct

The correct answer is A. \(2^3=8\). Each element of (A) has (2) choices in (B), so total functions are \(2^3=8\). In exams, use (n(B)^{n(A)}).

Step 3

Exam Tip

हर (A) के तत्व के लिए (B) की (2) पसंद हैं, इसलिए कुल \(2^3=8\) फलन हैं। परीक्षा में सूत्र (n(B)^{n(A)}) लगाएं।

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यदि \(A=\{1,2,3\}\), \(B=\{p,q,r\}\) और \(R=\{(1,p),(2,q),(2,r),(3,p)\}\) हो, तो (R) फलन क्यों नहीं है?

If \(A=\{1,2,3\}\), \(B=\{p,q,r\}\), and \(R=\{(1,p),(2,q),(2,r),(3,p)\}\), why is (R) not a function?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (2) की दो अलग छवियां हैंBecause (2) has two different images

Step 1

Concept

(2) is associated with both (q) and (r), so it is not a function. In exams, check different images of a repeated first component.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि (2) की दो अलग छवियां हैं / Because (2) has two different images. (2) is associated with both (q) and (r), so it is not a function. In exams, check different images of a repeated first component.

Step 3

Exam Tip

(2) को (q) और (r) दोनों से जोड़ा गया है, इसलिए यह फलन नहीं है। परीक्षा में दोहराए पहले घटक की अलग छवियां देखें।

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यदि \(A=\{1,2,3,4\}\), \(B=\{0,1\}\) और (f(x)=0) जब (x) सम हो तथा (f(x)=1) जब (x) विषम हो, तो (f(4)) क्या है?

If \(A=\{1,2,3,4\}\), \(B=\{0,1\}\), and (f(x)=0) when (x) is even and (f(x)=1) when (x) is odd, what is (f(4))?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

(4) is even, so (f(4)=0). In exams, identify the condition first in a piecewise rule.

Step 2

Why this answer is correct

The correct answer is A. (0). (4) is even, so (f(4)=0). In exams, identify the condition first in a piecewise rule.

Step 3

Exam Tip

(4) सम है, इसलिए (f(4)=0) होगा। परीक्षा में पीसवाइज नियम में शर्त पहले पहचानें।

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यदि \(f:{1,2,3}\to{2,5,10}\) को (f(x)=x-2+1) से परिभाषित किया गया है, तो (f(3)) का मान क्या होगा?

If \(f:{1,2,3}\to{2,5,10}\) is defined by (f(x)=x-2+1), what is the value of (f(3))?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

(f(3)=32+1=10). In exams, evaluate the power first and then add.

Step 2

Why this answer is correct

The correct answer is C. (10). (f(3)=32+1=10). In exams, evaluate the power first and then add.

Step 3

Exam Tip

(f(3)=32+1=10) है। परीक्षा में पहले घात का मान निकालें, फिर जोड़ें।

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यदि \(A=\{1,2,3\}\) और \(B=\{4,5,6,7\}\) हों, तो (A) से (B) में फलन होने पर क्रमित युग्मों की संख्या कितनी होगी?

If \(A=\{1,2,3\}\) and \(B=\{4,5,6,7\}\), how many ordered pairs will a function from (A) to (B) have?

Explanation opens after your attempt
Correct Answer

A. (3)

Step 1

Concept

A function assigns exactly one image to every element of domain (A), so it will have (3) pairs. In exams, pairs in a function equal the number of domain elements.

Step 2

Why this answer is correct

The correct answer is A. (3). A function assigns exactly one image to every element of domain (A), so it will have (3) pairs. In exams, pairs in a function equal the number of domain elements.

Step 3

Exam Tip

फलन में प्रांत (A) के हर तत्व की ठीक एक छवि होती है, इसलिए युग्मों की संख्या (3) होगी। परीक्षा में फलन के युग्म प्रांत के तत्वों के बराबर होते हैं।

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यदि \(A=\{1,2,3\}\), \(B=\{1,4,9,16\}\) और (f(x)=x-2) हो, तो कौन-सा तत्व सहप्रांत में है पर परिसर में नहीं है?

If \(A=\{1,2,3\}\), \(B=\{1,4,9,16\}\), and (f(x)=x-2), which element is in the codomain but not in the range?

Explanation opens after your attempt
Correct Answer

D. (16)

Step 1

Concept

The range is ({1,4,9}), so (16) is in the codomain but not in the range. In exams, keep codomain and range separate.

Step 2

Why this answer is correct

The correct answer is D. (16). The range is ({1,4,9}), so (16) is in the codomain but not in the range. In exams, keep codomain and range separate.

Step 3

Exam Tip

परिसर ({1,4,9}) है, इसलिए (16) सहप्रांत में है पर परिसर में नहीं। परीक्षा में सहप्रांत और परिसर को अलग रखें।

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यदि \(R=\{(1,a),(2,a),(3,a),(4,a)\}\) को \(A=\{1,2,3,4\}\) से \(B=\{a,b\}\) में माना जाए, तो (R) किसका उदाहरण है?

If \(R=\{(1,a),(2,a),(3,a),(4,a)\}\) is considered from \(A=\{1,2,3,4\}\) to \(B=\{a,b\}\), what is (R) an example of?

Explanation opens after your attempt
Correct Answer

A. स्थिर फलनConstant function

Step 1

Concept

All domain elements have image (a), so it is a constant function. In exams, the same image does not make a function invalid.

Step 2

Why this answer is correct

The correct answer is A. स्थिर फलन / Constant function. All domain elements have image (a), so it is a constant function. In exams, the same image does not make a function invalid.

Step 3

Exam Tip

सभी प्रांत तत्वों की छवि (a) है, इसलिए यह स्थिर फलन है। परीक्षा में समान छवि आने से फलन गलत नहीं होता।

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यदि \(f:\mathbb{R}\to\mathbb{R}\) को (f(x)=|x|) से परिभाषित किया गया है, तो निम्न में कौन-सा कथन सही है?

If \(f:\mathbb{R}\to\mathbb{R}\) is defined by (f(x)=|x|), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. यह फलन है क्योंकि हर (x) की ठीक एक छवि हैIt is a function because every (x) has exactly one image

Step 1

Concept

For every real (x), (|x|) gives one definite real value. Two different inputs having the same image does not invalidate a function.

Step 2

Why this answer is correct

The correct answer is A. यह फलन है क्योंकि हर (x) की ठीक एक छवि है / It is a function because every (x) has exactly one image. For every real (x), (|x|) gives one definite real value. Two different inputs having the same image does not invalidate a function.

Step 3

Exam Tip

हर वास्तविक (x) के लिए (|x|) एक निश्चित वास्तविक मान देता है। दो अलग इनपुट की समान छवि होना फलन को गलत नहीं करता।

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यदि \(f:\mathbb{R}\to\mathbb{R}\) को (f(x)=\frac{1}{x-2}) से परिभाषित किया जाए, तो यह पूरे \(\mathbb{R}\) पर फलन क्यों नहीं है?

If \(f:\mathbb{R}\to\mathbb{R}\) is defined by (f(x)=\frac{1}{x-2}), why is it not a function on all of \(\mathbb{R}\)?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (x=2) पर हर (0) हो जाता हैBecause the denominator becomes (0) at (x=2)

Step 1

Concept

(x=2) is in the domain but (f(2)) is not defined. In exams, find values that make the denominator zero.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि (x=2) पर हर (0) हो जाता है / Because the denominator becomes (0) at (x=2). (x=2) is in the domain but (f(2)) is not defined. In exams, find values that make the denominator zero.

Step 3

Exam Tip

(x=2) प्रांत में है पर (f(2)) परिभाषित नहीं है। परीक्षा में हर भिन्न में हर शून्य करने वाले मान खोजें।

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यदि \(f:\mathbb{R}\setminus{2}\to\mathbb{R}\) और (f(x)=\frac{1}{x-2}) हो, तो यह फलन क्यों है?

If \(f:\mathbb{R}\setminus{2}\to\mathbb{R}\) and (f(x)=\frac{1}{x-2}), why is it a function?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (x=2) को प्रांत से हटाया गया हैBecause (x=2) is removed from the domain

Step 1

Concept

After removing the value that made the denominator (0), every remaining (x) has one image. In exams, changing the domain can make a rule valid.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि (x=2) को प्रांत से हटाया गया है / Because (x=2) is removed from the domain. After removing the value that made the denominator (0), every remaining (x) has one image. In exams, changing the domain can make a rule valid.

Step 3

Exam Tip

जिस मान पर हर (0) होता था, उसे प्रांत से हटाने पर हर शेष (x) की एक छवि है। परीक्षा में प्रांत बदलने से नियम वैध हो सकता है।

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यदि \(A=\{1,2,3\}\) और \(B=\{2,4,6\}\) हों, तो संबंध \(R=\{(1,2),(2,4),(3,6),(3,4)\}\) में फलन की शर्त कौन तोड़ता है?

If \(A=\{1,2,3\}\) and \(B=\{2,4,6\}\), which element breaks the function condition in \(R=\{(1,2),(2,4),(3,6),(3,4)\}\)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

(3) has two different images (6) and (4). In exams, if one domain element has two images, the relation is not a function.

Step 2

Why this answer is correct

The correct answer is C. (3). (3) has two different images (6) and (4). In exams, if one domain element has two images, the relation is not a function.

Step 3

Exam Tip

(3) की दो अलग छवियां (6) और (4) हैं। परीक्षा में एक प्रांत तत्व की दो छवियां मिलें तो संबंध फलन नहीं है।

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यदि \(A=\{1,2,3,4,5\}\), \(B=\{0,1\}\) और (f(x)) को (x) के विषम होने पर (1) और सम होने पर (0) माना जाए, तो (f) का परिसर क्या है?

If \(A=\{1,2,3,4,5\}\), \(B=\{0,1\}\), and (f(x)) is (1) when (x) is odd and (0) when (x) is even, what is the range of (f)?

Explanation opens after your attempt
Correct Answer

C. ({0,1})

Step 1

Concept

(A) has both odd and even elements, so both images (1) and (0) are obtained. In exams, put only obtained values in the range.

Step 2

Why this answer is correct

The correct answer is C. ({0,1}). (A) has both odd and even elements, so both images (1) and (0) are obtained. In exams, put only obtained values in the range.

Step 3

Exam Tip

(A) में विषम और सम दोनों प्रकार के तत्व हैं, इसलिए छवियां (1) और (0) दोनों मिलती हैं। परीक्षा में परिसर में केवल प्राप्त मान रखें।

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यदि \(A=\{1,2\}\) और \(B=\{a,b,c\}\) हों, तो (A) से (B) में कुल संबंधों की संख्या कितनी है?

If \(A=\{1,2\}\) and \(B=\{a,b,c\}\), how many relations are there from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(2^6=64\)

Step 1

Concept

\(A\times B\) has \(2\times 3=6\) pairs, so the number of relations is \(2^6=64\). In exams, relations are counted as subsets.

Step 2

Why this answer is correct

The correct answer is A. \(2^6=64\). \(A\times B\) has \(2\times 3=6\) pairs, so the number of relations is \(2^6=64\). In exams, relations are counted as subsets.

Step 3

Exam Tip

\(A\times B\) में \(2\times 3=6\) युग्म हैं, इसलिए संबंधों की संख्या \(2^6=64\) है। परीक्षा में संबंध की गिनती उपसमुच्चयों से होती है।

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यदि \(A=\{1,2\}\) और \(B=\{a,b,c\}\) हों, तो (A) से (B) में कुल फलनों की संख्या कितनी है?

If \(A=\{1,2\}\) and \(B=\{a,b,c\}\), how many functions are there from (A) to (B)?

Explanation opens after your attempt
Correct Answer

B. \(3^2=9\)

Step 1

Concept

For (2) domain elements, there are (3) codomain choices each, so total functions are \(3^2=9\). In exams, keep the counts of functions and relations separate.

Step 2

Why this answer is correct

The correct answer is B. \(3^2=9\). For (2) domain elements, there are (3) codomain choices each, so total functions are \(3^2=9\). In exams, keep the counts of functions and relations separate.

Step 3

Exam Tip

प्रांत के (2) तत्वों के लिए सहप्रांत की (3) पसंद हैं, इसलिए कुल \(3^2=9\) फलन हैं। परीक्षा में फलन और संबंध की संख्या अलग रखें।

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यदि \(f=\{(1,2),(2,4),(3,6)\}\) हो, तो (f^{-1}={(2,1),(4,2),(6,3)}) को ({2,4,6}) से ({1,2,3}) में क्या माना जाएगा?

If \(f=\{(1,2),(2,4),(3,6)\}\), what will (f^{-1}={(2,1),(4,2),(6,3)}) be considered from ({2,4,6}) to ({1,2,3})?

Explanation opens after your attempt
Correct Answer

A. फलनFunction

Step 1

Concept

In the reversed relation, each first component (2,4,6) has exactly one image. In exams, test the inverse relation separately by the function condition.

Step 2

Why this answer is correct

The correct answer is A. फलन / Function. In the reversed relation, each first component (2,4,6) has exactly one image. In exams, test the inverse relation separately by the function condition.

Step 3

Exam Tip

उल्टे संबंध में हर पहले घटक (2,4,6) की ठीक एक छवि है। परीक्षा में उल्टा संबंध भी अलग से फलन शर्त से जांचें।

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यदि \(g:{0,1,2,3}\to{1,2,3,4}\) को (g(x)=x+1) से परिभाषित किया गया है, तो (g) का परिसर क्या है?

If \(g:{0,1,2,3}\to{1,2,3,4}\) is defined by (g(x)=x+1), what is the range of (g)?

Explanation opens after your attempt
Correct Answer

B. ({1,2,3,4})

Step 1

Concept

Substituting (x=0,1,2,3) gives images (1,2,3,4). In exams, apply the rule to every domain element while finding range.

Step 2

Why this answer is correct

The correct answer is B. ({1,2,3,4}). Substituting (x=0,1,2,3) gives images (1,2,3,4). In exams, apply the rule to every domain element while finding range.

Step 3

Exam Tip

(x=0,1,2,3) रखने पर छवियां (1,2,3,4) मिलती हैं। परीक्षा में परिसर निकालते समय हर प्रांत तत्व पर नियम लगाएं।

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यदि \(A=\{1,2,3\}\), \(B=\{x,y\}\) और \(R=\{(1,x),(3,y)\}\) हो, तो (R) फलन क्यों नहीं है?

If \(A=\{1,2,3\}\), \(B=\{x,y\}\), and \(R=\{(1,x),(3,y)\}\), why is (R) not a function?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (2) की कोई छवि नहीं हैBecause (2) has no image

Step 1

Concept

Every element of (A) must have exactly one image in a function, but (2) is missing. In exams, compare first components with the whole domain.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि (2) की कोई छवि नहीं है / Because (2) has no image. Every element of (A) must have exactly one image in a function, but (2) is missing. In exams, compare first components with the whole domain.

Step 3

Exam Tip

फलन में (A) के हर तत्व की ठीक एक छवि होनी चाहिए, पर (2) छूट गया है। परीक्षा में पहले घटकों को पूरे प्रांत से मिलाएं।

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यदि \(f:{1,2,3,4}\to{1,2}\) को (f(x)=1) जब \(x\le 2\) और (f(x)=2) जब (x>2) से परिभाषित किया गया है, तो (f(2)) क्या है?

If \(f:{1,2,3,4}\to{1,2}\) is defined by (f(x)=1) when \(x\le 2\) and (f(x)=2) when (x>2), what is (f(2))?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

Because \(2\le 2\), (f(2)=1). In exams, watch the difference between \(\le\) and (<).

Step 2

Why this answer is correct

The correct answer is A. (1). Because \(2\le 2\), (f(2)=1). In exams, watch the difference between \(\le\) and (<).

Step 3

Exam Tip

क्योंकि \(2\le 2\), इसलिए (f(2)=1) है। परीक्षा में \(\le\) और (<) के अंतर को ध्यान से देखें।

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यदि \(f:{1,2,3,4}\to{1,2}\) को (f(x)=1) जब (x<2) और (f(x)=2) जब \(x\ge 2\) से परिभाषित किया गया है, तो (f(2)) क्या है?

If \(f:{1,2,3,4}\to{1,2}\) is defined by (f(x)=1) when (x<2) and (f(x)=2) when \(x\ge 2\), what is (f(2))?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

Because \(2\ge 2\), (f(2)=2). In exams, check which condition contains the boundary point.

Step 2

Why this answer is correct

The correct answer is B. (2). Because \(2\ge 2\), (f(2)=2). In exams, check which condition contains the boundary point.

Step 3

Exam Tip

क्योंकि \(2\ge 2\), इसलिए (f(2)=2) है। परीक्षा में सीमा बिंदु किस शर्त में आता है यह जांचें।

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यदि \(A=\{1,2,3\}\) और \(B=\{4,5,6\}\) हों, तो कौन-सा संबंध (A) से (B) में फलन है?

If \(A=\{1,2,3\}\) and \(B=\{4,5,6\}\), which relation is a function from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. ({(1,4),(2,5),(3,6)})

Step 1

Concept

In option (A), all (1,2,3) have exactly one image. In exams, every domain element must appear.

Step 2

Why this answer is correct

The correct answer is A. ({(1,4),(2,5),(3,6)}). In option (A), all (1,2,3) have exactly one image. In exams, every domain element must appear.

Step 3

Exam Tip

विकल्प (A) में (1,2,3) सभी की ठीक एक छवि है। परीक्षा में हर प्रांत तत्व का आना जरूरी है।

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यदि \(f:A\to B\) है और (f(a)=b), तो (a) को (b) का क्या कहा जाता है?

If \(f:A\to B\) and (f(a)=b), what is (a) called for (b)?

Explanation opens after your attempt
Correct Answer

A. पूर्वछविPreimage

Step 1

Concept

In (f(a)=b), (a) is called the preimage and (b) is called the image. In exams, do not reverse these two terms.

Step 2

Why this answer is correct

The correct answer is A. पूर्वछवि / Preimage. In (f(a)=b), (a) is called the preimage and (b) is called the image. In exams, do not reverse these two terms.

Step 3

Exam Tip

(f(a)=b) में (a) पूर्वछवि और (b) छवि कहलाता है। परीक्षा में इन दोनों शब्दों को उल्टा न करें।

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यदि \(f:A\to B\) है और (f(a)=b), तो (b) को (a) का क्या कहा जाता है?

If \(f:A\to B\) and (f(a)=b), what is (b) called for (a)?

Explanation opens after your attempt
Correct Answer

A. छविImage

Step 1

Concept

(b) is the image of (a) because applying (f) to (a) gives (b). In exams, understand (f(a)) as the output.

Step 2

Why this answer is correct

The correct answer is A. छवि / Image. (b) is the image of (a) because applying (f) to (a) gives (b). In exams, understand (f(a)) as the output.

Step 3

Exam Tip

(b), (a) की छवि है क्योंकि (a) पर (f) लगाने से (b) मिलता है। परीक्षा में (f(a)) को आउटपुट समझें।

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यदि \(A=\{1,2,3,4\}\), \(B=\{2,4,6,8\}\) और \(f=\{(1,2),(2,4),(3,6),(4,8)\}\) हो, तो (f) का प्रांत क्या है?

If \(A=\{1,2,3,4\}\), \(B=\{2,4,6,8\}\), and \(f=\{(1,2),(2,4),(3,6),(4,8)\}\), what is the domain of (f)?

Explanation opens after your attempt
Correct Answer

A. ({1,2,3,4})

Step 1

Concept

The domain is the set of first components, so it is ({1,2,3,4}). In exams, look at the first components of ordered pairs.

Step 2

Why this answer is correct

The correct answer is A. ({1,2,3,4}). The domain is the set of first components, so it is ({1,2,3,4}). In exams, look at the first components of ordered pairs.

Step 3

Exam Tip

प्रांत पहले घटकों का समुच्चय है, इसलिए ({1,2,3,4}) है। परीक्षा में क्रमित युग्मों के पहले घटक देखें।

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यदि \(f=\{(1,3),(2,3),(3,5),(4,5)\}\) हो, तो (f) का परिसर क्या है?

If \(f=\{(1,3),(2,3),(3,5),(4,5)\}\), what is the range of (f)?

Explanation opens after your attempt
Correct Answer

B. ({3,5})

Step 1

Concept

The range is the set of distinct second components, so it is ({3,5}). In exams, write a repeated value once in a set.

Step 2

Why this answer is correct

The correct answer is B. ({3,5}). The range is the set of distinct second components, so it is ({3,5}). In exams, write a repeated value once in a set.

Step 3

Exam Tip

परिसर अलग-अलग दूसरे घटकों का समुच्चय है, इसलिए ({3,5}) है। परीक्षा में दोहराए मान को समुच्चय में एक बार लिखें।

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यदि \(A=\{1,2,3\}\) और \(B=\{0,1,2\}\) हों, तथा (f(x)) को (x) को (2) से भाग देने पर शेषफल माना जाए, तो (f) का परिसर क्या होगा?

If \(A=\{1,2,3\}\) and \(B=\{0,1,2\}\), and (f(x)) is the remainder when (x) is divided by (2), what will be the range of (f)?

Explanation opens after your attempt
Correct Answer

A. ({0,1})

Step 1

Concept

Dividing (1,2,3) by (2) gives remainders (1,0,1). Therefore the range is ({0,1}).

Step 2

Why this answer is correct

The correct answer is A. ({0,1}). Dividing (1,2,3) by (2) gives remainders (1,0,1). Therefore the range is ({0,1}).

Step 3

Exam Tip

(1,2,3) को (2) से भाग देने पर शेषफल (1,0,1) हैं। इसलिए परिसर ({0,1}) है।

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यदि \(A=\{2,3,4\}\), \(B=\{4,9,16,25\}\) और (f(x)=x-2) हो, तो सहप्रांत का कौन-सा तत्व परिसर में नहीं आएगा?

If \(A=\{2,3,4\}\), \(B=\{4,9,16,25\}\), and (f(x)=x-2), which element of the codomain will not be in the range?

Explanation opens after your attempt
Correct Answer

D. (25)

Step 1

Concept

The range is ({4,9,16}), so (25) is not obtained. In exams, every codomain element need not be in the range.

Step 2

Why this answer is correct

The correct answer is D. (25). The range is ({4,9,16}), so (25) is not obtained. In exams, every codomain element need not be in the range.

Step 3

Exam Tip

परिसर ({4,9,16}) है, इसलिए (25) प्राप्त नहीं होता। परीक्षा में सहप्रांत का हर तत्व जरूरी नहीं कि परिसर हो।

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यदि \(f:{1,2,3,4}\to{1,2,3,4}\) और (f(x)=5-x) है, तो (f(1)) क्या होगा?

If \(f:{1,2,3,4}\to{1,2,3,4}\) and (f(x)=5-x), what will (f(1)) be?

Explanation opens after your attempt
Correct Answer

D. (4)

Step 1

Concept

(f(1)=5-1=4). In exams, substitute the value directly in the given rule.

Step 2

Why this answer is correct

The correct answer is D. (4). (f(1)=5-1=4). In exams, substitute the value directly in the given rule.

Step 3

Exam Tip

(f(1)=5-1=4) है। परीक्षा में दिए गए नियम में मान सीधे रखें।

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यदि \(f:{1,2,3,4}\to{1,2,3,4}\) और (f(x)=5-x) है, तो (f) के क्रमित युग्म कौन-से हैं?

If \(f:{1,2,3,4}\to{1,2,3,4}\) and (f(x)=5-x), which are the ordered pairs of (f)?

Explanation opens after your attempt
Correct Answer

A. ({(1,4),(2,3),(3,2),(4,1)})

Step 1

Concept

Putting (x=1,2,3,4) gives images (4,3,2,1). In exams, write the output of each input in order.

Step 2

Why this answer is correct

The correct answer is A. ({(1,4),(2,3),(3,2),(4,1)}). Putting (x=1,2,3,4) gives images (4,3,2,1). In exams, write the output of each input in order.

Step 3

Exam Tip

(x=1,2,3,4) रखने पर छवियां (4,3,2,1) मिलती हैं। परीक्षा में हर इनपुट का आउटपुट क्रम से लिखें।

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यदि \(f:\mathbb{N}\to\mathbb{N}\) को (f(x)=2x+1) से परिभाषित किया गया है, तो (f(6)) क्या है?

If \(f:\mathbb{N}\to\mathbb{N}\) is defined by (f(x)=2x+1), what is (f(6))?

Explanation opens after your attempt
Correct Answer

B. (13)

Step 1

Concept

\(f(6)=2\times 6+1=13\). In exams, multiply first and then add.

Step 2

Why this answer is correct

The correct answer is B. (13). \(f(6)=2\times 6+1=13\). In exams, multiply first and then add.

Step 3

Exam Tip

\(f(6)=2\times 6+1=13\) है। परीक्षा में गुणा पहले और जोड़ बाद में करें।

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यदि \(A=\{1,2,3\}\) और \(B=\{1,3,5,7\}\) हों, तथा (f(x)=2x-1) हो, तो (f) का परिसर क्या है?

If \(A=\{1,2,3\}\) and \(B=\{1,3,5,7\}\), and (f(x)=2x-1), what is the range of (f)?

Explanation opens after your attempt
Correct Answer

A. ({1,3,5})

Step 1

Concept

(f(1)=1), (f(2)=3), and (f(3)=5). In exams, the range is only the set of obtained images.

Step 2

Why this answer is correct

The correct answer is A. ({1,3,5}). (f(1)=1), (f(2)=3), and (f(3)=5). In exams, the range is only the set of obtained images.

Step 3

Exam Tip

(f(1)=1), (f(2)=3) और (f(3)=5) हैं। परीक्षा में परिसर केवल प्राप्त छवियों का समुच्चय है।

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यदि \(A=\{1,2,3\}\) और \(B=\{a,b,c,d\}\) हों, तो (A) से (B) में स्थिर फलनों की संख्या कितनी होगी?

If \(A=\{1,2,3\}\) and \(B=\{a,b,c,d\}\), how many constant functions are there from (A) to (B)?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

In a constant function, all domain elements map to one chosen element of (B). Therefore the number of constant functions is (4).

Step 2

Why this answer is correct

The correct answer is B. (4). In a constant function, all domain elements map to one chosen element of (B). Therefore the number of constant functions is (4).

Step 3

Exam Tip

स्थिर फलन में सभी प्रांत तत्वों की छवि (B) के किसी एक तत्व पर जाती है। इसलिए स्थिर फलनों की संख्या (4) है।

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यदि \(A=\{1,2,3\}\), \(B=\{u,v,w\}\) और \(f=\{(1,u),(2,v),(3,w)\}\) हो, तो (f) का परिसर क्या है?

If \(A=\{1,2,3\}\), \(B=\{u,v,w\}\), and \(f=\{(1,u),(2,v),(3,w)\}\), what is the range of (f)?

Explanation opens after your attempt
Correct Answer

B. ({u,v,w})

Step 1

Concept

The second components (u,v,w) are all obtained images. In exams, the range is the set of second components.

Step 2

Why this answer is correct

The correct answer is B. ({u,v,w}). The second components (u,v,w) are all obtained images. In exams, the range is the set of second components.

Step 3

Exam Tip

दूसरे घटक (u,v,w) सभी प्राप्त छवियां हैं। परीक्षा में परिसर दूसरे घटकों का समुच्चय होता है।

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यदि \(A=\{1,2,3\}\) और \(B=\{a,b,c\}\) हों, तो कौन-सा विकल्प फलन नहीं है क्योंकि प्रांत का एक तत्व छूट गया है?

If \(A=\{1,2,3\}\) and \(B=\{a,b,c\}\), which option is not a function because one domain element is missing?

Explanation opens after your attempt
Correct Answer

A. ({(1,a),(2,b)})

Step 1

Concept

In option (A), (3) has no image. In exams, the whole domain must be covered for a function.

Step 2

Why this answer is correct

The correct answer is A. ({(1,a),(2,b)}). In option (A), (3) has no image. In exams, the whole domain must be covered for a function.

Step 3

Exam Tip

विकल्प (A) में (3) की कोई छवि नहीं है। परीक्षा में फलन के लिए पूरा प्रांत कवर होना चाहिए।

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यदि \(R=\{(x,y):y=x+3,\ x\in{1,2,3}\}\) हो, तो (R) के क्रमित युग्म क्या हैं?

If \(R=\{(x,y):y=x+3,\ x\in{1,2,3}\}\), what are the ordered pairs of (R)?

Explanation opens after your attempt
Correct Answer

A. ({(1,4),(2,5),(3,6)})

Step 1

Concept

Putting (x=1,2,3) gives (y=4,5,6). In exams, convert set-builder rules into pairs for checking.

Step 2

Why this answer is correct

The correct answer is A. ({(1,4),(2,5),(3,6)}). Putting (x=1,2,3) gives (y=4,5,6). In exams, convert set-builder rules into pairs for checking.

Step 3

Exam Tip

(x=1,2,3) रखने पर (y=4,5,6) मिलता है। परीक्षा में सेट-बिल्डर नियम को युग्मों में बदलकर जांचें।

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यदि \(R=\{(x,y):y^2=x,\ x\in{1,4},\ y\in{-2,-1,1,2}\}\) को (x) से (y) की ओर माना जाए, तो (R) फलन क्यों नहीं है?

If \(R=\{(x,y):y^2=x,\ x\in{1,4},\ y\in{-2,-1,1,2}\}\) is considered from (x) to (y), why is (R) not a function?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (x=1) की दो छवियां (1) और (-1) हैंBecause (x=1) has two images (1) and (-1)

Step 1

Concept

From \(y^2=1\), both (y=1) and (y=-1) are obtained. In exams, if one input has two images, it is not a function.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि (x=1) की दो छवियां (1) और (-1) हैं / Because (x=1) has two images (1) and (-1). From \(y^2=1\), both (y=1) and (y=-1) are obtained. In exams, if one input has two images, it is not a function.

Step 3

Exam Tip

\(y^2=1\) से (y=1) और (y=-1) दोनों मिलते हैं। परीक्षा में एक इनपुट की दो छवियां मिलें तो फलन नहीं होता।

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यदि \(A=\{1,2,3,4\}\) और \(B=\{1,4,9,16\}\) हों, तथा (f(x)=x-2) हो, तो (f) के बारे में कौन-सा कथन सही है?

If \(A=\{1,2,3,4\}\) and \(B=\{1,4,9,16\}\), and (f(x)=x-2), which statement about (f) is correct?

Explanation opens after your attempt
Correct Answer

A. यह (A) से (B) में फलन हैIt is a function from (A) to (B)

Step 1

Concept

For every \(x\in A\), \(x^2\in B\) and the image is exactly one. In exams, check whether the rule's images lie in the codomain.

Step 2

Why this answer is correct

The correct answer is A. यह (A) से (B) में फलन है / It is a function from (A) to (B). For every \(x\in A\), \(x^2\in B\) and the image is exactly one. In exams, check whether the rule's images lie in the codomain.

Step 3

Exam Tip

प्रत्येक \(x\in A\) के लिए \(x^2\in B\) और छवि ठीक एक है। परीक्षा में नियम की छवियां सहप्रांत में हैं या नहीं, यह देखें।

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यदि \(A=\{1,2,3\}\), \(B=\{2,4,8\}\) और (f(x)=2^x) हो, तो (f) का परिसर क्या है?

If \(A=\{1,2,3\}\), \(B=\{2,4,8\}\), and (f(x)=2^x), what is the range of (f)?

Explanation opens after your attempt
Correct Answer

B. ({2,4,8})

Step 1

Concept

\(2^1=2\), \(2^2=4\), and \(2^3=8\), so the range is ({2,4,8}). In exams, substitute every input in an exponential rule.

Step 2

Why this answer is correct

The correct answer is B. ({2,4,8}). \(2^1=2\), \(2^2=4\), and \(2^3=8\), so the range is ({2,4,8}). In exams, substitute every input in an exponential rule.

Step 3

Exam Tip

\(2^1=2\), \(2^2=4\) और \(2^3=8\), इसलिए परिसर ({2,4,8}) है। परीक्षा में घातीय नियम में हर इनपुट रखें।

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यदि \(f:{1,2,3,4}\to{0,1,2}\) को (f(x)=x-2) से परिभाषित किया जाए, तो यह फलन क्यों नहीं है?

If \(f:{1,2,3,4}\to{0,1,2}\) is defined by (f(x)=x-2), why is it not a function?

Explanation opens after your attempt
Correct Answer

A. क्योंकि (f(1)=-1) है और \(-1\notin{0,1,2}\)Because (f(1)=-1) and \(-1\notin{0,1,2}\)

Step 1

Concept

(f(1)=-1) is not in codomain (B), so it is not a function from (A) to (B). In exams, every output must lie in the codomain.

Step 2

Why this answer is correct

The correct answer is A. क्योंकि (f(1)=-1) है और \(-1\notin{0,1,2}\) / Because (f(1)=-1) and \(-1\notin{0,1,2}\). (f(1)=-1) is not in codomain (B), so it is not a function from (A) to (B). In exams, every output must lie in the codomain.

Step 3

Exam Tip

(f(1)=-1) सहप्रांत (B) में नहीं है, इसलिए यह (A) से (B) में फलन नहीं होगा। परीक्षा में आउटपुट सहप्रांत में होना चाहिए।

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यदि \(f:{2,3,4}\to{0,1,2}\) को (f(x)=x-2) से परिभाषित किया जाए, तो (f) का परिसर क्या है?

If \(f:{2,3,4}\to{0,1,2}\) is defined by (f(x)=x-2), what is the range of (f)?

Explanation opens after your attempt
Correct Answer

A. ({0,1,2})

Step 1

Concept

(f(2)=0), (f(3)=1), and (f(4)=2), so the range is ({0,1,2}). In exams, changing the domain changes the range too.

Step 2

Why this answer is correct

The correct answer is A. ({0,1,2}). (f(2)=0), (f(3)=1), and (f(4)=2), so the range is ({0,1,2}). In exams, changing the domain changes the range too.

Step 3

Exam Tip

(f(2)=0), (f(3)=1) और (f(4)=2), इसलिए परिसर ({0,1,2}) है। परीक्षा में डोमेन बदलने से परिसर भी बदलता है।

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यदि \(A=\{1,2,3\}\) और \(B=\{a,b,c\}\) हों, तो कौन-सा संबंध एक-एक फलन का उदाहरण है?

If \(A=\{1,2,3\}\) and \(B=\{a,b,c\}\), which relation is an example of a one-one function?

Explanation opens after your attempt
Correct Answer

A. ({(1,a),(2,b),(3,c)})

Step 1

Concept

In option (A), different domain elements have different images. In exams, for a one-one function, images should not repeat.

Step 2

Why this answer is correct

The correct answer is A. ({(1,a),(2,b),(3,c)}). In option (A), different domain elements have different images. In exams, for a one-one function, images should not repeat.

Step 3

Exam Tip

विकल्प (A) में अलग-अलग प्रांत तत्वों की छवियां अलग-अलग हैं। परीक्षा में एक-एक फलन के लिए छवियों की पुनरावृत्ति न हो।

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यदि \(A=\{1,2,3\}\), \(B=\{a,b,c,d\}\) और \(f=\{(1,a),(2,b),(3,c)\}\) हो, तो (d) के बारे में क्या सही है?

If \(A=\{1,2,3\}\), \(B=\{a,b,c,d\}\), and \(f=\{(1,a),(2,b),(3,c)\}\), what is true about (d)?

Explanation opens after your attempt
Correct Answer

A. (d) सहप्रांत में है पर परिसर में नहीं(d) is in the codomain but not in the range

Step 1

Concept

(d) is an element of codomain (B), but no domain element maps to it. In exams, the codomain may contain extra elements.

Step 2

Why this answer is correct

The correct answer is A. (d) सहप्रांत में है पर परिसर में नहीं / (d) is in the codomain but not in the range. (d) is an element of codomain (B), but no domain element maps to it. In exams, the codomain may contain extra elements.

Step 3

Exam Tip

(d) सहप्रांत (B) का तत्व है पर कोई प्रांत तत्व उस पर नहीं जा रहा। परीक्षा में सहप्रांत में अतिरिक्त तत्व हो सकते हैं।

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यदि \(A=\{1,2,3,4\}\) और \(B=\{a,b\}\) हों, तो (A) से (B) में कुल फलनों की संख्या क्या है?

If \(A=\{1,2,3,4\}\) and \(B=\{a,b\}\), what is the number of functions from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(2^4=16\)

Step 1

Concept

There are (2) choices from (B) for each of the (4) elements of (A), so there are \(2^4=16\) functions. In exams, the base is the size of the codomain.

Step 2

Why this answer is correct

The correct answer is A. \(2^4=16\). There are (2) choices from (B) for each of the (4) elements of (A), so there are \(2^4=16\) functions. In exams, the base is the size of the codomain.

Step 3

Exam Tip

(A) के (4) तत्वों के लिए (B) की (2) पसंद हैं, इसलिए \(2^4=16\) फलन हैं। परीक्षा में आधार सहप्रांत की संख्या होती है।

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यदि \(A=\{1,2,3,4\}\) और \(B=\{a,b\}\) हों, तो (A) से (B) में कुल संबंधों की संख्या क्या है?

If \(A=\{1,2,3,4\}\) and \(B=\{a,b\}\), what is the number of relations from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(2^8=256\)

Step 1

Concept

\(A\times B\) has \(4\times 2=8\) pairs, so total relations are \(2^8=256\). In exams, count subsets of the Cartesian product for relations.

Step 2

Why this answer is correct

The correct answer is A. \(2^8=256\). \(A\times B\) has \(4\times 2=8\) pairs, so total relations are \(2^8=256\). In exams, count subsets of the Cartesian product for relations.

Step 3

Exam Tip

\(A\times B\) में \(4\times 2=8\) युग्म हैं, इसलिए कुल संबंध \(2^8=256\) हैं। परीक्षा में संबंधों के लिए कार्टेशियन गुणनफल के उपसमुच्चय गिनें।

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यदि \(f:{0,1,2}\to{0,1,4}\) और (f(x)=x-2) हो, तो कौन-सा कथन सही है?

If \(f:{0,1,2}\to{0,1,4}\) and (f(x)=x-2), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (f) फलन है और इसका परिसर ({0,1,4}) है(f) is a function and its range is ({0,1,4})

Step 1

Concept

Every domain element has exactly one image and the images are ({0,1,4}). In exams, identify domain and range separately.

Step 2

Why this answer is correct

The correct answer is A. (f) फलन है और इसका परिसर ({0,1,4}) है / (f) is a function and its range is ({0,1,4}). Every domain element has exactly one image and the images are ({0,1,4}). In exams, identify domain and range separately.

Step 3

Exam Tip

हर प्रांत तत्व की ठीक एक छवि है और छवियां ({0,1,4}) हैं। परीक्षा में प्रांत और परिसर को अलग-अलग पहचानें।

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यदि \(A=\{1,2,3\}\), \(B=\{3,6,9,12\}\) और (f(x)=3x) हो, तो (12) के बारे में क्या सही है?

If \(A=\{1,2,3\}\), \(B=\{3,6,9,12\}\), and (f(x)=3x), what is true about (12)?

Explanation opens after your attempt
Correct Answer

A. (12) सहप्रांत में है पर परिसर में नहीं(12) is in the codomain but not in the range

Step 1

Concept

(f(1),f(2),f(3)) give (3,6,9), not (12). In exams, do not put an unattained codomain element in the range.

Step 2

Why this answer is correct

The correct answer is A. (12) सहप्रांत में है पर परिसर में नहीं / (12) is in the codomain but not in the range. (f(1),f(2),f(3)) give (3,6,9), not (12). In exams, do not put an unattained codomain element in the range.

Step 3

Exam Tip

(f(1),f(2),f(3)) से (3,6,9) मिलते हैं, (12) नहीं। परीक्षा में अप्राप्त सहप्रांत तत्व को परिसर में न रखें।

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यदि \(A=\{1,2,3\}\) और \(B=\{0,1\}\) हों, तो (A) से (B) में कोई फलन चुनने के लिए हर प्रांत तत्व के लिए कितनी स्वतंत्र पसंद होती है?

If \(A=\{1,2,3\}\) and \(B=\{0,1\}\), how many independent choices are there for each domain element while choosing a function from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

Each domain element can map to either (0) or (1), so there are (2) choices for each. In exams, multiply these choices for the total count.

Step 2

Why this answer is correct

The correct answer is A. (2). Each domain element can map to either (0) or (1), so there are (2) choices for each. In exams, multiply these choices for the total count.

Step 3

Exam Tip

हर प्रांत तत्व (0) या (1) में से किसी एक पर जा सकता है, इसलिए प्रत्येक के लिए (2) पसंद हैं। परीक्षा में कुल गिनती के लिए इन पसंदों को गुणा करें।

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यदि \(A=\{1,2,3,4\}\), \(B=\{5,6\}\) और \(R=\{(1,5),(2,6),(4,5)\}\) हो, तो (R) को (A) से (B) में फलन बनाने के लिए कौन-सा युग्म जोड़ा जा सकता है?

If \(A=\{1,2,3,4\}\), \(B=\{5,6\}\), and \(R=\{(1,5),(2,6),(4,5)\}\), which pair can be added to make (R) a function from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. ((3,5))

Step 1

Concept

Only (3) in domain (A) has no image, so adding ((3,5)) gives every element exactly one image. In exams, first identify the missing domain element.

Step 2

Why this answer is correct

The correct answer is A. ((3,5)). Only (3) in domain (A) has no image, so adding ((3,5)) gives every element exactly one image. In exams, first identify the missing domain element.

Step 3

Exam Tip

प्रांत (A) में केवल (3) की छवि नहीं है, इसलिए ((3,5)) जोड़ने से हर तत्व की ठीक एक छवि हो जाएगी। परीक्षा में पहले छूटे हुए प्रांत तत्व को पहचानें।

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FAQs

Class 11 Mathematics Quiz FAQs

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