Question 114244
Given:
{{{f(x) =5x}}} and {{{g(x) = 2x+1}}}

Find: {{{(gof)(-1)}}}

Since {{{(f o g)(x) = f ( g(x) )}}} we will have:

{{{(f o g)(x) = f ( g(x) ) = f(2x+1)= 5(2x+1)= 10x + 5}}}....now plug in {{{x=-1}}}


 {{{(f o g)(-1)= 10x + 5= 10(-1) +5= -10+5 = -5}}}