Update
Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है • Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है • Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है
Subjects

Class 11 Mathematics Hard Quiz

Level 28 • 50/50 questions • 30 seconds per question.

Level readiness 50/50 Questions
Time Left 25:00 30 sec/question
RewardsCoins + XP
ModeClassic Quiz
Share
Question 1 / 50 0 score
Answered 0/50 Correct 0 Time 25:00

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

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

Explanation opens after your attempt
Correct Answer

A. \(R=\{(1,4),(2,4),(3,5)\}\)

Explanation

Simple Explanation

हर \(x\in A\) की ठीक एक छवि (B) में है। परीक्षा में पहले domain के हर element की उपस्थिति और uniqueness जांचें। / Every \(x\in A\) has exactly one image in (B). In exams, first check presence and uniqueness for each domain element.

Open Question Page
Ask Friends

यदि \(A=\{a,b,c,d\}\) और \(B=\{0,1\}\) हैं, तो (A) से (B) तक कुल कितने फलन बन सकते हैं?

If \(A=\{a,b,c,d\}\) and \(B=\{0,1\}\), how many functions can be formed from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(2^4=16\)

Explanation

Simple Explanation

(A) के हर (4) element के लिए (B) में (2) choices हैं, इसलिए कुल \(2^4=16\) फलन हैं। सूत्र याद रखें: (A) से (B) तक फलन \(=|B|^{|A|}\)। / Each of the (4) elements of (A) has (2) choices in (B), so total functions are \(2^4=16\). Remember the formula: functions from (A) to (B) \(=|B|^{|A|}\).

Open Question Page
Ask Friends

यदि \(R=\{(x,y):y=x^2,\ x\in{-2,-1,0,1}\}\) और codomain \(B=\{0,1,4\}\) है, तो (R) के बारे में सही कथन क्या है?

If \(R=\{(x,y):y=x^2,\ x\in{-2,-1,0,1}\}\) and codomain is \(B=\{0,1,4\}\), which statement about (R) is correct?

Explanation opens after your attempt
Correct Answer

A. (R) फलन है(R) is a function

Explanation

Simple Explanation

एक input की ठीक एक output होना जरूरी है; अलग inputs की same output हो सकती है। common mistake: same image को function rule का violation न मानें। / A function needs exactly one output for each input; different inputs may have the same output. Common mistake: do not treat same image as a violation of function rule.

Open Question Page
Ask Friends

कौन-सा संबंध \(A=\{1,2,3\}\) से \(B=\{p,q,r\}\) में फलन नहीं है?

Which relation from \(A=\{1,2,3\}\) to \(B=\{p,q,r\}\) is not a function?

Explanation opens after your attempt
Correct Answer

C. \(R=\{(1,p),(2,q),(2,r),(3,p)\}\)

Explanation

Simple Explanation

यहां \(2\in A\) की दो images (q) और (r) हैं। फलन में एक input की दो अलग outputs नहीं हो सकतीं। / Here \(2\in A\) has two images (q) and (r). In a function, one input cannot have two different outputs.

Open Question Page
Ask Friends

यदि \(f=\{(2,5),(3,7),(4,9),(5,11)\}\), तो (f) को rule form में कैसे लिखा जा सकता है?

If \(f=\{(2,5),(3,7),(4,9),(5,11)\}\), how can (f) be written in rule form?

Explanation opens after your attempt
Correct Answer

A. (f(x)=2x+1)

Explanation

Simple Explanation

हर ordered pair में (y=2x+1) satisfies करता है। दिए गए pairs से rule पहचानते समय सभी pairs पर rule जांचें। / Every ordered pair satisfies (y=2x+1). While identifying a rule from pairs, test the rule on all pairs.

Open Question Page
Ask Friends

यदि \(f:A\to B\), \(A=\{0,1,2,3\}\), \(B=\{1,3,5,7,9\}\) और (f(x)=2x+1), तो range क्या है?

If \(f:A\to B\), \(A=\{0,1,2,3\}\), \(B=\{1,3,5,7,9\}\), and (f(x)=2x+1), what is the range?

Explanation opens after your attempt
Correct Answer

A. \({1,3,5,7})

Explanation

Simple Explanation

(x=0,1,2,3) रखने पर outputs (1,3,5,7) मिलते हैं। range हमेशा actual images का set होता है, पूरा codomain जरूरी नहीं। / Putting (x=0,1,2,3) gives outputs (1,3,5,7). The range is the set of actual images, not necessarily the whole codomain.

Open Question Page
Ask Friends

कौन-सा mapping diagram फलन को दर्शाता है?

Which mapping diagram represents a function?

Explanation opens after your attempt
Correct Answer

A. हर \(a\in A\) से (B) के ठीक एक element तक arrow हैEvery \(a\in A\) has exactly one arrow to an element of (B)

Explanation

Simple Explanation

फलन में domain के प्रत्येक element से ठीक एक arrow निकलना चाहिए। diagram में arrows की direction और count दोनों देखें। / In a function, exactly one arrow must start from each domain element. In diagrams, check both arrow direction and arrow count.

Open Question Page
Ask Friends

यदि \(f=\{(1,2),(2,3),(3,4)\}\) को \(A=\{1,2,3,4\}\) से \(B=\{2,3,4,5\}\) में relation माना जाए, तो यह (A) से (B) में फलन क्यों नहीं है?

If \(f=\{(1,2),(2,3),(3,4)\}\) is considered as a relation from \(A=\{1,2,3,4\}\) to \(B=\{2,3,4,5\}\), why is it not a function from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(4\in A\) की कोई image नहीं है\(4\in A\) has no image

Explanation

Simple Explanation

(A) के हर element की image होनी चाहिए, लेकिन (4) missing है। codomain का कोई unused element होना function को गलत नहीं बनाता। / Every element of (A) must have an image, but (4) is missing. An unused element of the codomain does not make a function invalid.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3\}\) और \(B=\{0,1,2,3\}\), तो relation \(R=\{(x,y):y<x,\ x\in A,\ y\in B\}\) किस कारण फलन नहीं है?

If \(A=\{1,2,3\}\) and \(B=\{0,1,2,3\}\), why is the relation \(R=\{(x,y):y<x,\ x\in A,\ y\in B\}\) not a function?

Explanation opens after your attempt
Correct Answer

A. (x=3) के लिए (y=0,1,2) possible हैंFor (x=3), (y=0,1,2) are possible

Explanation

Simple Explanation

(x=3) की कई images हैं, इसलिए uniqueness टूटती है। inequality वाले relations में एक input पर possible outputs गिनें। / For (x=3), there are many images, so uniqueness fails. In inequality relations, count possible outputs for one input.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3,4\}\) और \(f:A\to A\) by (f(x)=5-x), तो कौन-सा ordered pair (f) में नहीं होगा?

If \(A=\{1,2,3,4\}\) and \(f:A\to A\) by (f(x)=5-x), which ordered pair will not belong to (f)?

Explanation opens after your attempt
Correct Answer

D. \((4,0))

Explanation

Simple Explanation

(f(4)=1), इसलिए ((4,0)) relation में नहीं है। ordered pair जांचते समय first coordinate को rule में रखकर image निकालें। / (f(4)=1), so ((4,0)) is not in the relation. To test an ordered pair, put the first coordinate into the rule.

Open Question Page
Ask Friends

यदि \(f=\{(x,y):y=\frac{x+1}{2},\ x\in{1,3,5,7}\}\), तो (f) की range क्या है?

If \(f=\{(x,y):y=\frac{x+1}{2},\ x\in{1,3,5,7}\}\), what is the range of (f)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

(x=1,3,5,7) पर (y=1,2,3,4) मिलता है। range निकालने में केवल outputs लिखें। / For (x=1,3,5,7), we get (y=1,2,3,4). To find range, write only the outputs.

Open Question Page
Ask Friends

एक relation \(R\subseteq A\times B\) कब (A) से (B) में फलन कहलाता है?

When is a relation \(R\subseteq A\times B\) called a function from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. हर \(a\in A\) के लिए ठीक एक \(b\in B\) हो ताकि \((a,b)\in R\)For every \(a\in A\), there is exactly one \(b\in B\) such that \((a,b)\in R\)

Explanation

Simple Explanation

फलन की शर्त domain elements पर लगती है, codomain elements पर नहीं। definition questions में exactly one शब्द सबसे जरूरी है। / The condition for a function is on domain elements, not codomain elements. In definition questions, the words exactly one are most important.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3\}\) और \(B=\{1,4,9,16\}\), तो relation \(R=\{(x,y):y=x^2,\ x\in A,\ y\in B\}\) में कितने ordered pairs होंगे?

If \(A=\{1,2,3\}\) and \(B=\{1,4,9,16\}\), how many ordered pairs are in \(R=\{(x,y):y=x^2,\ x\in A,\ y\in B\}\)?

Explanation opens after your attempt
Correct Answer

A. (3)

Explanation

Simple Explanation

(x=1,2,3) के लिए pairs ((1,1),(2,4),(3,9)) मिलते हैं। rule relation में domain values को systematically substitute करें। / For (x=1,2,3), pairs are ((1,1),(2,4),(3,9)). In rule-based relations, substitute domain values systematically.

Open Question Page
Ask Friends

यदि \(f:A\to B\) एक फलन है और \(A=\{2,4,6\}\), तो (f) में ordered pairs की संख्या क्या होगी?

If \(f:A\to B\) is a function and \(A=\{2,4,6\}\), what will be the number of ordered pairs in (f)?

Explanation opens after your attempt
Correct Answer

A. (3)

Explanation

Simple Explanation

किसी भी फलन में ordered pairs की संख्या domain के elements की संख्या के बराबर होती है। यहां (|A|=3), इसलिए pairs (3) हैं। / In any function, the number of ordered pairs equals the number of elements in the domain. Here (|A|=3), so there are (3) pairs.

Open Question Page
Ask Friends

यदि \(R=\{(1,2),(2,2),(3,2),(4,2)\}\), तो (R) किस प्रकार का relation है \(A=\{1,2,3,4\}\) से \(B=\{2,5\}\) तक?

If \(R=\{(1,2),(2,2),(3,2),(4,2)\}\), what type of relation is (R) from \(A=\{1,2,3,4\}\) to \(B=\{2,5\}\)?

Explanation opens after your attempt
Correct Answer

A. यह constant function हैIt is a constant function

Explanation

Simple Explanation

हर input की image (2) है, इसलिए यह constant function है। एक ही output बार-बार आना function को invalid नहीं बनाता। / Every input has image (2), so it is a constant function. Repeated output does not make a function invalid.

Open Question Page
Ask Friends

कौन-सा relation \(A=\{1,2,3,4\}\) से \(B=\{1,2,3,4\}\) में identity function है?

Which relation is the identity function from \(A=\{1,2,3,4\}\) to \(B=\{1,2,3,4\}\)?

Explanation opens after your attempt
Correct Answer

A. \(R=\{(1,1),(2,2),(3,3),(4,4)\}\)

Explanation

Simple Explanation

identity function में हर \(x\in A\) की image वही (x) होती है। इसे (I_A(x)=x) से पहचानें। / In an identity function, every \(x\in A\) maps to the same (x). Identify it by (I_A(x)=x).

Open Question Page
Ask Friends

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

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

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

domain first coordinates का set है और यहां \(A=\{1,2,3\}\) है। ordered pairs और domain को अलग-अलग पहचानें। / The domain is the set of first coordinates, and here \(A=\{1,2,3\}\). Distinguish ordered pairs from the domain.

Open Question Page
Ask Friends

कौन-सा कथन हमेशा सत्य है यदि \(f:A\to B\) एक फलन है?

Which statement is always true if \(f:A\to B\) is a function?

Explanation opens after your attempt
Correct Answer

A. हर \(a\in A\) के लिए \(f(a)\in B\) unique होता हैFor every \(a\in A\), \(f(a)\in B\) is unique

Explanation

Simple Explanation

function में हर domain element की unique image codomain में होती है। यह जरूरी नहीं कि पूरा codomain range बन जाए। / In a function, every domain element has a unique image in the codomain. The whole codomain need not become the range.

Open Question Page
Ask Friends

यदि (f(x)=x-2-4) और domain \(A=\{-3,-2,-1,0,1\}\), तो (f) की range कौन-सी है?

If (f(x)=x-2-4) and domain \(A=\{-3,-2,-1,0,1\}\), which is the range of (f)?

Explanation opens after your attempt
Correct Answer

A. \({-4,-3,0,5})

Explanation

Simple Explanation

outputs (5,0,-3,-4,-3) हैं, इसलिए distinct values ({-4,-3,0,5}) range हैं। set में repeated values नहीं लिखते। / The outputs are (5,0,-3,-4,-3), so distinct values ({-4,-3,0,5}) form the range. Repeated values are not written in a set.

Open Question Page
Ask Friends

यदि \(f:A\to B\) में \(A=\{1,2,3\}\), \(B=\{a,b,c,d\}\) और \(f=\{(1,a),(2,b),(3,b)\}\), तो range क्या है?

If \(f:A\to B\) has \(A=\{1,2,3\}\), \(B=\{a,b,c,d\}\), and \(f=\{(1,a),(2,b),(3,b)\}\), what is the range?

Explanation opens after your attempt
Correct Answer

A. \({a,b})

Explanation

Simple Explanation

actual images केवल (a) और (b) हैं। range को codomain से confuse न करें। / The actual images are only (a) and (b). Do not confuse range with codomain.

Open Question Page
Ask Friends

यदि (A) में (m) elements और (B) में (n) elements हैं, तो (A) से (B) में फलनों की संख्या क्या होगी?

If (A) has (m) elements and (B) has (n) elements, what is the number of functions from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(n^m\)

Explanation

Simple Explanation

domain के हर (m) element के लिए codomain में (n) choices हैं, इसलिए कुल \(n^m\) फलन हैं। exponent हमेशा domain size पर होता है। / Each of the (m) domain elements has (n) choices in the codomain, so total functions are \(n^m\). The exponent is always the domain size.

Open Question Page
Ask Friends

यदि \(A=\{0,1\}\) और \(B=\{2,3,4\}\), तो (A) से (B) में कितने possible functions हैं?

If \(A=\{0,1\}\) and \(B=\{2,3,4\}\), how many possible functions are there from (A) to (B)?

Explanation opens after your attempt
Correct Answer

A. \(3^2=9\)

Explanation

Simple Explanation

यहां (|A|=2) और (|B|=3), इसलिए functions \(=3^2=9\)। counting में base codomain size और exponent domain size रखें। / Here (|A|=2) and (|B|=3), so functions \(=3^2=9\). In counting, keep codomain size as base and domain size as exponent.

Open Question Page
Ask Friends

कौन-सा relation real numbers पर फलन नहीं बनाता?

Which relation on real numbers does not define a function?

Explanation opens after your attempt
Correct Answer

B. \(y^2=x\) with (x>0)

Explanation

Simple Explanation

\(y^2=x\) में (x=4) पर (y=2) और (y=-2) दोनों मिलते हैं। एक (x) की दो (y) values function नहीं बनातीं। / In \(y^2=x\), for (x=4), both (y=2) and (y=-2) are possible. Two (y)-values for one (x) do not define a function.

Open Question Page
Ask Friends

यदि \(A=\{-1,0,1,2\}\) और (f(x)=|x|), तो (f) के ordered pairs कौन-से हैं?

If \(A=\{-1,0,1,2\}\) and (f(x)=|x|), which are the ordered pairs of (f)?

Explanation opens after your attempt
Correct Answer

A. \({(-1,1),(0,0),(1,1),(2,2)})

Explanation

Simple Explanation

absolute value में (|-1|=1), (|0|=0), (|1|=1), (|2|=2)। ordered pair में first coordinate input ही रहता है। / For absolute value, (|-1|=1), (|0|=0), (|1|=1), and (|2|=2). In an ordered pair, the first coordinate remains the input.

Open Question Page
Ask Friends

यदि \(R=\{(x,y):x+y=5,\ x,y\in{1,2,3,4}\}\), तो (R) \(A=\{1,2,3,4\}\) से (A) में कैसा है?

If \(R=\{(x,y):x+y=5,\ x,y\in{1,2,3,4}\}\), what is (R) from \(A=\{1,2,3,4\}\) to (A)?

Explanation opens after your attempt
Correct Answer

A. यह फलन हैIt is a function

Explanation

Simple Explanation

हर \(x\in A\) के लिए (y=5-x) unique और (A) में है। equation relation को function बनाने के लिए uniqueness check करें। / For every \(x\in A\), (y=5-x) is unique and lies in (A). For an equation relation, check uniqueness to decide function status.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3,4\}\), \(B=\{1,2\}\) और \(R={(x,y):x\) (y) से divisible है(}), तो (R) फलन क्यों नहीं है?

If \(A=\{1,2,3,4\}\), \(B=\{1,2\}\), and \(R={(x,y):x\) is divisible by (y)(}), why is (R) not a function?

Explanation opens after your attempt
Correct Answer

A. (x=2) के लिए (y=1) और (y=2) दोनों possible हैंFor (x=2), both (y=1) and (y=2) are possible

Explanation

Simple Explanation

(x=2) की दो images बनती हैं, इसलिए uniqueness नहीं रहती। divisibility relations में एक input के सभी divisors in codomain देखें। / (x=2) gets two images, so uniqueness fails. In divisibility relations, check all divisors in the codomain for one input.

Open Question Page
Ask Friends

कौन-सा relation \(A=\{1,2,3\}\) से \(B=\{2,3,4,5,6\}\) में (f(x)=x+2) को दर्शाता है?

Which relation from \(A=\{1,2,3\}\) to \(B=\{2,3,4,5,6\}\) represents (f(x)=x+2)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

(f(1)=3), (f(2)=4), और (f(3)=5)। rule से relation बनाते समय हर domain element की image लिखें। / (f(1)=3), (f(2)=4), and (f(3)=5). When forming a relation from a rule, write the image of every domain element.

Open Question Page
Ask Friends

यदि relation (R) को \(R=\{(x,y):y=2x,\ x\in{1,2,3}\}\) से define किया गया है, तो (R) का codomain न्यूनतम कौन-सा हो सकता है ताकि (R) फलन बने?

If relation (R) is defined by \(R=\{(x,y):y=2x,\ x\in{1,2,3}\}\), what can be the smallest codomain so that (R) is a function?

Explanation opens after your attempt
Correct Answer

A. \({2,4,6})

Explanation

Simple Explanation

outputs (2,4,6) हैं, इसलिए smallest codomain इन्हीं images का set हो सकता है। codomain में सभी possible outputs होने चाहिए। / The outputs are (2,4,6), so the smallest codomain can be the set of these images. The codomain must contain all possible outputs.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3,4,5\}\) और \(B=\{0,1\}\), तो relation \(R={(x,y):y\) (x) की parity है(}) में (y=0) even और (y=1) odd के लिए क्या (R) फलन है?

If \(A=\{1,2,3,4,5\}\) and \(B=\{0,1\}\), for relation \(R={(x,y):y\) is the parity of (x)(}) with (y=0) for even and (y=1) for odd, is (R) a function?

Explanation opens after your attempt
Correct Answer

A. हाँ, क्योंकि हर (x) की exactly one parity हैYes, because every (x) has exactly one parity

Explanation

Simple Explanation

हर number या तो even है या odd, दोनों नहीं। many inputs की same parity होना allowed है। / Every number is either even or odd, not both. Many inputs having the same parity is allowed.

Open Question Page
Ask Friends

यदि \(f=\{(1,3),(2,5),(3,7),(4,9)\}\), तो (f(3)+f(4)) का मान क्या है?

If \(f=\{(1,3),(2,5),(3,7),(4,9)\}\), what is the value of (f(3)+f(4))?

Explanation opens after your attempt
Correct Answer

A. (16)

Explanation

Simple Explanation

ordered pairs से (f(3)=7) और (f(4)=9), इसलिए sum (16) है। function value पढ़ते समय input first coordinate होता है। / From the ordered pairs, (f(3)=7) and (f(4)=9), so the sum is (16). While reading function values, the input is the first coordinate.

Open Question Page
Ask Friends

यदि \(f:A\to B\) और \(f=\{(a,1),(b,2),(c,1),(d,3)\}\), तो (A) क्या है?

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

Explanation opens after your attempt
Correct Answer

A. \({a,b,c,d})

Explanation

Simple Explanation

domain ordered pairs के first components का set है। यहां \(A=\{a,b,c,d\}\) है। / The domain is the set of first components of ordered pairs. Here \(A=\{a,b,c,d\}\).

Open Question Page
Ask Friends

कौन-सा relation \(A=\{1,2,3\}\) से \(B=\{1,2,3\}\) में neither function nor empty relation है?

Which relation from \(A=\{1,2,3\}\) to \(B=\{1,2,3\}\) is neither a function nor an empty relation?

Explanation opens after your attempt
Correct Answer

A. \(R=\{(1,1),(1,2),(2,3)\}\)

Explanation

Simple Explanation

यह empty नहीं है, लेकिन (1) की दो images हैं और (3) की image missing है। hard MCQ में दोनों conditions अलग-अलग जांचें। / It is not empty, but (1) has two images and (3) has no image. In hard MCQs, check both conditions separately.

Open Question Page
Ask Friends

यदि (f(x)=\frac{1}{x-2}) और domain natural numbers में से लिया जाए, तो कौन-सा (x) domain में नहीं हो सकता?

If (f(x)=\frac{1}{x-2}) and the domain is taken from natural numbers, which (x) cannot be in the domain?

Explanation opens after your attempt
Correct Answer

A. (2)

Explanation

Simple Explanation

(x=2) पर denominator (0) हो जाता है, इसलिए (f(2)) defined नहीं है। rational function में denominator zero न हो, यह जरूरी है। / At (x=2), the denominator becomes (0), so (f(2)) is not defined. In a rational function, the denominator must not be zero.

Open Question Page
Ask Friends

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

If \(f:{1,2,3}\to{1,2,3,4,5}\) by (f(x)=x-2), is (f) a valid function?

Explanation opens after your attempt
Correct Answer

A. नहीं, क्योंकि \(f(3)=9\notin{1,2,3,4,5}\)No, because \(f(3)=9\notin{1,2,3,4,5}\)

Explanation

Simple Explanation

output unique तो है, लेकिन (f(3)=9) codomain में नहीं है। function के लिए image codomain के अंदर भी होनी चाहिए। / The output is unique, but (f(3)=9) is not in the codomain. For a function, every image must also lie in the codomain.

Open Question Page
Ask Friends

यदि \(f:{0,1,2}\to{0,1,2,3,4}\) by (f(x)=x-2), तो (f) का graph as ordered pairs क्या है?

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

Explanation opens after your attempt
Correct Answer

A. \({(0,0),(1,1),(2,4)})

Explanation

Simple Explanation

\(0^2=0\), \(1^2=1\), और \(2^2=4\)। function का graph finite case में ordered pairs का set है। / \(0^2=0\), \(1^2=1\), and \(2^2=4\). In a finite case, the graph of a function is the set of ordered pairs.

Open Question Page
Ask Friends

एक student ने \(R=\{(1,a),(2,b),(2,c),(3,d)\}\) को function कहा। उसकी गलती क्या है?

A student called \(R=\{(1,a),(2,b),(2,c),(3,d)\}\) a function. What is the mistake?

Explanation opens after your attempt
Correct Answer

A. (2) की दो different images (b) और (c) हैं(2) has two different images (b) and (c)

Explanation

Simple Explanation

एक input (2) दो outputs से जुड़ा है, इसलिए यह function नहीं है। function check में repeated first coordinate पर सबसे पहले ध्यान दें। / One input (2) is related to two outputs, so it is not a function. In function checks, first notice repeated first coordinates.

Open Question Page
Ask Friends

यदि \(f:A\to B\) में \(A=\{1,2,3,4\}\), \(B=\{0,1\}\) और (f(x)=0) जब (x) even हो तथा (f(x)=1) जब (x) odd हो, तो (f^{-1}({0})) क्या है?

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

Explanation opens after your attempt
Correct Answer

A. \({2,4})

Explanation

Simple Explanation

(f(x)=0) even inputs (2) और (4) पर मिलता है। preimage हमेशा domain के elements का set होता है। / (f(x)=0) occurs for even inputs (2) and (4). A preimage is always a set of domain elements.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3\}\), तो (A) से (A) में identity function और constant function (c(x)=1) में मुख्य अंतर क्या है?

If \(A=\{1,2,3\}\), what is the main difference between the identity function on (A) and the constant function (c(x)=1)?

Explanation opens after your attempt
Correct Answer

A. identity में \(x\mapsto x\), constant में हर \(x\mapsto 1\)In identity, \(x\mapsto x\); in constant, every \(x\mapsto 1\)

Explanation

Simple Explanation

identity input को उसी पर map करती है, जबकि constant function हर input को same value पर भेजता है। दोनों valid functions हो सकते हैं। / Identity maps each input to itself, while a constant function sends every input to the same value. Both can be valid functions.

Open Question Page
Ask Friends

यदि \(R=\{(x,y):y=|x-2|,\ x\in{0,1,2,3,4}\}\), तो (R) की range क्या है?

If \(R=\{(x,y):y=|x-2|,\ x\in{0,1,2,3,4}\}\), what is the range of (R)?

Explanation opens after your attempt
Correct Answer

A. \({0,1,2})

Explanation

Simple Explanation

outputs (2,1,0,1,2) हैं, इसलिए distinct range ({0,1,2}) है। set में order और repetition important नहीं होते। / The outputs are (2,1,0,1,2), so the distinct range is ({0,1,2}). In a set, order and repetition are not important.

Open Question Page
Ask Friends

यदि \(f=\{(1,4),(2,8),(3,12)\}\), तो (f(x)) का simplest rule क्या है?

If \(f=\{(1,4),(2,8),(3,12)\}\), what is the simplest rule for (f(x))?

Explanation opens after your attempt
Correct Answer

A. (f(x)=4x)

Explanation

Simple Explanation

हर pair में second coordinate first coordinate का (4) times है। rule पहचानने के लिए सभी given values पर verify करें। / In every pair, the second coordinate is (4) times the first coordinate. To identify a rule, verify it on all given values.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4,5\}\) और (f(x)=x+1), तो (f) की range और codomain के बारे में सही कथन कौन-सा है?

If \(A=\{1,2,3,4\}\), \(B=\{1,2,3,4,5\}\), and (f(x)=x+1), which statement about range and codomain is correct?

Explanation opens after your attempt
Correct Answer

A. range (={2,3,4,5}), codomain (={1,2,3,4,5})

Explanation

Simple Explanation

actual outputs (2,3,4,5) हैं, जबकि codomain given (B) है। range हमेशा codomain का subset होती है। / The actual outputs are (2,3,4,5), while the codomain is the given set (B). The range is always a subset of the codomain.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3\}\) और \(B=\{a,b\}\), तो कितने relations (A) से (B) में functions नहीं हैं?

If \(A=\{1,2,3\}\) and \(B=\{a,b\}\), how many relations from (A) to (B) are not functions?

Explanation opens after your attempt
Correct Answer

A. \(2^{6}-2^3=56\)

Explanation

Simple Explanation

कुल relations \(2^{|A\times B|}=2^6=64\) हैं और functions \(2^3=8\) हैं। not functions (=64-8=56)। / Total relations are \(2^{|A\times B|}=2^6=64\), and functions are \(2^3=8\). Hence not functions (=64-8=56).

Open Question Page
Ask Friends

यदि \(A=\{1,2\}\), \(B=\{p,q,r\}\), तो total relations और total functions क्रमशः क्या हैं?

If \(A=\{1,2\}\), \(B=\{p,q,r\}\), what are the total relations and total functions respectively?

Explanation opens after your attempt
Correct Answer

A. \(2^6\) और \(3^2\)\(2^6\) and \(3^2\)

Explanation

Simple Explanation

\(|A\times B|=6\), इसलिए relations \(2^6\) और functions \(3^2\) हैं। relation और function counting formulas अलग रखें। / \(|A\times B|=6\), so relations are \(2^6\) and functions are \(3^2\). Keep relation and function counting formulas separate.

Open Question Page
Ask Friends

यदि \(R=\{(x,y):y=x+1,\ x\in{1,2,3},\ y\in{2,3}\}\), तो (R) \(A=\{1,2,3\}\) से \(B=\{2,3\}\) में function क्यों नहीं है?

If \(R=\{(x,y):y=x+1,\ x\in{1,2,3},\ y\in{2,3}\}\), why is (R) not a function from \(A=\{1,2,3\}\) to \(B=\{2,3\}\)?

Explanation opens after your attempt
Correct Answer

A. (x=3) के लिए \(y=4\notin B\), इसलिए image नहीं बनतीFor (x=3), \(y=4\notin B\), so no image is formed

Explanation

Simple Explanation

(x=3) का required output (4) codomain में नहीं है, इसलिए domain का हर element mapped नहीं है। codomain restriction relation को बदल सकती है। / The required output for (x=3) is (4), which is not in the codomain, so every domain element is not mapped. A codomain restriction can change the relation.

Open Question Page
Ask Friends

किस relation में repeated first coordinate होने पर भी वह function हो सकता है?

In which relation can repeated first coordinate still represent a function?

Explanation opens after your attempt
Correct Answer

A. जब repeated first coordinate की image वही same हो और duplicate pair हटाने पर uniqueness रहेWhen the repeated first coordinate has the same image and uniqueness remains after removing duplicate pairs

Explanation

Simple Explanation

set में duplicate ordered pair अलग element नहीं माना जाता। यदि same input same output ही दे रहा है, तो uniqueness नहीं टूटती। / A duplicate ordered pair is not a separate element in a set. If the same input gives the same output, uniqueness is not broken.

Open Question Page
Ask Friends

यदि \(R=\{(1,2),(1,2),(2,3),(3,4)\}\) को set of ordered pairs माना जाए, तो क्या यह \(A=\{1,2,3\}\) से \(B=\{2,3,4\}\) में function है?

If \(R=\{(1,2),(1,2),(2,3),(3,4)\}\) is treated as a set of ordered pairs, is it a function from \(A=\{1,2,3\}\) to \(B=\{2,3,4\}\)?

Explanation opens after your attempt
Correct Answer

A. हाँ, duplicate ((1,2)) same pair हैYes, duplicate ((1,2)) is the same pair

Explanation

Simple Explanation

sets में repeated pair count नहीं होता, इसलिए each input की unique image है। duplicate pair और different image को अलग-अलग समझें। / In sets, a repeated pair is not counted, so each input has a unique image. Understand duplicate pair and different image separately.

Open Question Page
Ask Friends

यदि \(f:A\to B\) है और (f(a)=f(b)) for \(a\ne b\), तो इससे क्या निष्कर्ष निकलता है?

If \(f:A\to B\) and (f(a)=f(b)) for \(a\ne b\), what conclusion follows?

Explanation opens after your attempt
Correct Answer

A. (f) फिर भी function हो सकता है(f) may still be a function

Explanation

Simple Explanation

दो अलग inputs की same image होना function rule का violation नहीं है। violation तभी होता है जब एक input की दो अलग images हों। / Two different inputs having the same image does not violate the function rule. Violation occurs when one input has two different images.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3\}\) और \(f:A\to A\) by (f(x)=4-x), तो (f) कैसा है?

If \(A=\{1,2,3\}\) and \(f:A\to A\) by (f(x)=4-x), what is (f)?

Explanation opens after your attempt
Correct Answer

A. valid function with graph ({(1,3),(2,2),(3,1)})

Explanation

Simple Explanation

हर \(x\in A\) पर \(4-x\in A\) और output unique है। closed output और uniqueness दोनों check करें। / For every \(x\in A\), \(4-x\in A\) and the output is unique. Check both closed output and uniqueness.

Open Question Page
Ask Friends

यदि \(R=\{(x,y):x=|y|,\ x\in{1,2},\ y\in{-2,-1,1,2}\}\), तो (R) \(A=\{1,2\}\) से \(B=\{-2,-1,1,2\}\) में function क्यों नहीं है?

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

Explanation opens after your attempt
Correct Answer

A. (x=1) की images (y=-1) और (y=1) दोनों हैं(x=1) has images (y=-1) and (y=1)

Explanation

Simple Explanation

(x=1) के लिए दो possible (y) values हैं, इसलिए uniqueness टूटती है। absolute value relation को direction के साथ पढ़ें। / For (x=1), two possible (y)-values exist, so uniqueness fails. Read an absolute value relation with direction carefully.

Open Question Page
Ask Friends

यदि \(A=\{1,2,3,4\}\) और \(B=\{1,4,9,16\}\), तो relation \(R=\{(x,y):y=x^2\}\) के लिए कौन-सा statement सही है?

If \(A=\{1,2,3,4\}\) and \(B=\{1,4,9,16\}\), which statement is correct for the relation \(R=\{(x,y):y=x^2\}\)?

Explanation opens after your attempt
Correct Answer

A. (R) (A) से (B) में function है और range (=B) है(R) is a function from (A) to (B) and range (=B)

Explanation

Simple Explanation

हर \(x\in A\) की unique image (1,4,9,16) में है और सभी codomain elements images हैं। इस case में range और codomain equal हैं। / Every \(x\in A\) has a unique image in (1,4,9,16), and all codomain elements are images. In this case, range and codomain are equal.

Open Question Page
Ask Friends
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 30 seconds per question for Hard 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.