Given f(x)=x+4 and g(x)=3x-2

Question

find (f+g)(3) and (f times g)(-2)

Answer 1

Hey Zach,

 

(f+g) means x+4+3x-2. Plug 3 in and you'll get 14.

 

(f*g) means 3x²+10x-8 from multiplying f(x) and g(x). Plug in -2 and you'll get -16. 

 

I assume (f*g)(-2) is not f(g(-2)).

 

                                   RJ