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Let A = {1, 2, 5, 7}, B = {3, 4, 5, 6, ...

Let A = {1, 2, 5, 7}, B = {3, 4, 5, 6, 7}
Let `f : A rarr B` be defined by f(1) = 3, f(2) = 4,f(2) = 6, f(5) = 5, f(7) = 5.
Check whether `f : A rarr B` is a function or not.

Text Solution

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Here f is not a function as 2 has two images 4 and 6 in B.
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