Question

let f(x)= 1-2x^2; g(x)=x+1
compute
(g of f)(x

Answer 1

then its g(1-2x^2) = (1 -2x^2) + 1

= 2 - 2x^2

Answer 2

now what do i do if I replace x with (-1)

Answer 3

do I take 2-2(-1)=0

Answer 4

just sub x = -1

Answer 5

thanks