Question

Find f(-4),f(-3.1),f(1.2)and f (2.8)for f(x)=x

Answer 1

The answer is f(-4) = -4 ,f(-3.1) = -3.1 , f(1.2) = 1.2 , f(2.8) = 2.8

Explanation:

We have to find out f(-4) , f(-3.1) , f(1.2) , f(2.8)

For the condition f(x) = x

This means that whatever we give input to the function the value to the

function is equal to the value input this means that

f (input) = output

Here output = input

f ( input ) = input

∵ f(-4) = -4

f(-3.1) = -3.1

f(1.2) = 1.2

f(2.8) = 2.8