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Subjects

Mathematics

Relations

In this Class 11 Mathematics topic, students learn how a relation connects elements of one set with elements of another, building the foundation for the chapter Relations and Functions. The topic introduces ordered pairs, Cartesian products, and the representation of relations as subsets of a Cartesian product. Students also examine the domain, codomain, and range of a relation and learn to interpret relations through rosters, diagrams, and set notation, preparing them to distinguish relations from functions.

Easy · Level 4 · 25 questions

Practice questions

01If (A={1,2}) and (R=\varnothing), is (R) reflexive?

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02If (A={1,2}) and (R=A\times A), is (R) reflexive?

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03If (A={1,2}) and (R=A\times A), is (R) symmetric?

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04If (A={1,2}) and (R=A\times A), is (R) transitive?

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05If (R={(1,1),(2,2)}), why is (R) symmetric?

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06If (A={1,2,3,4,5}) and (R={(a,b):a) is one less than (b}), which pair is correct?

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07If (R={(a,b):a) and (b) have same parity(}), which pair is in (R)?

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08If A={1,2,3} and R={(a,b):a+b is odd}, which pair is not in R?

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09A relation R on a set A is called reflexive if which of the following condition is true?

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10If (A={1,2,3}) and (R={(1,1),(2,2),(3,3),(1,3)}), is (R) reflexive?

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11If (R={(1,2),(2,1),(3,3)}), is (R) symmetric?

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12If (R={(1,2),(2,3),(1,3),(3,3)}), what do ( (1,2) ) and ( (2,3) ) require in transitive condition?

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13If A = {1, 2, 3, 4} and R = {(a, b) : a + b = 6}, which of the following ordered pairs belongs to R?

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14If (A={1,2,3}) and (R={(a,b):a\ne b}), which pair will not be in (R)?

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15If (A={1,2,4}) and (R={(a,b):a=b^2}), which ordered pair is in (R)?

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16If (A={2,4,6}) and (B={1,3}), then a relation from (A) to (B) will be a subset of what?

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17If A = {5, 7}, which is the identity relation on A?

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18If (A={p,q,r}), how many ordered pairs will be in the universal relation on (A)?

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19If \(A=\{1,3,5\}\) and \(R=\{(1,3),(3,5)\}\), which type of relation is \(R\)?

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20If A={1,2,3,4} and R={(a,b)∈A×A : a+b=7}, which of the following ordered pairs is a member of R?

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21If (A={1,2,3,4}) and (R={(a,b):a+b=7}), how many ordered pairs are in (R)?

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22If the relation \(R=\{(2,4),(3,9),(4,16)\}\) is given by ordered pairs, which rule satisfies these pairs?

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23If R = {(x, y) : y = x + 3}, which ordered pair belongs to R?

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24If A = {1, 2, 3} and R = {(a, b): a < b}, which pair will not belong to R?

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25If \(A=\{2,3,4,5\}\) and \(R=\{(a,b)\in A\times A:a\ge b\}\), which of the following ordered pairs belongs to \(R\)?

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