Question

Given: f(x) = 4x+1 and g(x)= x2+1, find (f g)x.

Answer 1

given

fx = 4x+1

gx= 2x+1

Explanation:

fg x = ?

we know ,

f g x = (4x+1) ( 2x+1)

= 4x ( 2x+1) +1 (2x+1)

= 8x² +4x +2x+1

= 8x² + 6x +1