Question

Given f(x) = x + 1 and g(x) = x – 1, find (fg)(x).

is it x^2-1

Answer 1

\(\large\color{black}{ f(x) = x + 1 }\)
\(\large\color{black}{ \color{green}{ g(x)} = \color{red}{ x- 1} }\)

\(\large\color{black}{ f(\color{green}{ g(x)} ) = (\color{red}{ x- 1} ) + 1 }\)
\(\large\color{black}{ f(\color{green}{ g(x)} ) = ? }\)

Answer 2

SolomonZelman I think it might be "f times g"

Answer 3

@jim_thompson5910 is right its f times g

Answer 4

so you'd do

(f*g) = f(x)*g(x) = (x+1)*(x-1) = x^2 - 1

which means you are indeed correct

Answer 5

Thank you (:

Answer 6

you're welcome