Question

Let f(x)=2n and g(x)=-n-4

Find (f o g)(n)

A. -2n - 4

B. 2n - 8

C. 2n - 4

D. -2n - 8

Answer 1

(f o g)(n) = f(g(n))


f(n) = 2n

f(g(n)) = 2*(g(n)) ... replace every 'n' with g(n)

f(g(n)) = 2*(-n-4) ... replace every g(n) with -n-4 on the right side

I'll let you distribute and simplify that out

Answer 2

So is the answer D

Answer 3

yep