Let A= 1,2,3 and B= 2,3,4 , then which of the following relations is a function from A to B?

JEE Main Mathematics question

Let and , then which of the following relations is a function from to ?

(A)
(B)
(C)Correct
(D)

Answer: (C)

Solution

A relation from to is a function only if EVERY element of appears exactly once as a first entry, with its image lying in . Option (A): the element 2 appears twice, as and — one input has two images, so not a function. Option (B):

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-007326