If R is a relation from a non – empty set A to a non – empty set B, then
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Let R be the relation over the set of straight lines of a plane such that l_{1} R l_{2} ⇔ l_{1} ⊥ l_{2}. Then, R is
The binary relation S = Φ (empty set) on set A = {1, 2, 3} is
The void relation (a subset of A x A) on a non empty set A is:
The domain of the function f = {(1, 3), (3, 5), (2, 6)} is
Let R be the relation on N defined as x R y if x + 2 y = 8. The domain of R is
If n ≥ 2, then the number of onto mappings or surjections that can be defined from {1, 2, 3, 4, ……….., n} onto {1, 2} is
Which of the following is not an equivalence relation on I, the set of integers ; x, y
If A = {1, 2, 3}, then the relation R = {(1, 2), (2, 3), (1, 3) in A is
Let A = {a, b, c} and R = {(a, a), (b, b), (c, c), (b, c)} be a relation on A. Here, R is
A relation R from C to R is defined by x Ry iff x = y. Which of the following is correct?
A relation R in a set A is said to be an equivalence relation if
Let f: R → R be a mapping such that f(x) = . Then f is
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209 videos443 docs143 tests
