How do you find f(g(4)) if f(x)=2x+3 and g(x)=3x+1?

1 Answer
Dec 24, 2015

f(g(4))=4i2

Explanation:

First, find g(4). Then, plug that value into f(x).

Find g(4):

×××xg(4)=3(4)+1
×××xg(4)=11

Find f(g(4)), which is equivalent to f(11):

×××xf(11)=211+3
×××xf(11)=28
×××xf(11)=22i2
×××xf(11)=4i2

Thus,

×××xf(g(4))=4i2