Question

Q. explain it

If f is a function from A to B and (a, b) ∈ f, then f (a) = b, where b is called the image of a under f and a is called the preimage of b under f.​

Answer 1

Answer:

Input in function is calls domain which is a. And output is range which is b here.

When you give your function a value a it returns b. So b is called

image of a under function f.

Example :

Let a function f(x) = 3x

When we give x = 2 we get f(2) = 6.

So 6 is image of 2 under f here