Question

A function f is defined by f:x→1-2x.Obtain expressions in the same form for f^3.

Answer 1

f(x) = 1-2x

f(f) = 1-2f = 1-2(1-2x) = -1+4x
f(f(f)) = 1-2f(f) = 1-2(-1+4x) = 3-8x