Question

For the functions f(x)=4x+5 and g(x)=6x+4,find (f•g)(0)and (g•f)(0)

Answer 1

Hi,

f°g means : apply first g then f . so calculate "g" and then use result as "x" in f.

g°f means : you apply first f then g

so : f°g = 4 (g (x)) +5

4 (6x+4) +5 = 24x+16+5 = 24x+21

Answer 2

Explanation:

f(x)=4x+5

g(x)=6x+4,

first: (f*g)=(4x+5) (6x+4)=24x²+46x+20

next:(f*g)(0)=((g*f)=24x²+46x+20=20