Question

Given f(x)=x^2+7 and g(x)=x-4/x. Find (g • f)(-1)

Answer 1

(g • f)(-1) is just g(f(-1))

insert f(x) into g(x)

\[g(f(x)) = \frac{f(x) - 4}{f(x)}\]

Answer 2

we know f(x) = x^2+7

so replace f(x) in what I wrote with x^2 + 7 then just sub -1 into x and you will have the answer you seek