Question

whic expression is equal to (fg)(x)
f(x)=x+6; g(x)=x^2-2
a.x^3-x^2-6x-12
b.x^3+6x^2-2x-12
c. x^3-12
d. x^3+4

Answer 1

For fg(x)
Put the function g(x) in place of x in function f(x) then you will get fg(x)
Example: f(x)=x+1, g(x)=x^2
Then for fg(x) put g(x) or x^2 in place of x
So. fg(x)=x^2+1