Question

Find f¹(x) for the function f(x)= x/3

f¹(x) = [?]x

Answer 1

3x

Explanation:

f(x) = x/3

let , y=f(x)

or y=x/3

inter changing x and y, we get,

x=y/3

or, 3x=y. ( cross multiplication)

therefore f-1(x) 3x