Question

if f(x)=3x^3 +3x^2+3, what is f(-1)?

Answer 1

Function given:

$f(x)=3x^3+3x^2+3$

To get f(-1), we have to replace x by -1 as follows:

$f(-1)=3(-1)^3+3(-1)^2+3$

$f(-1)=3\cdot(-1)+3\cdot1+3$

$f(-1)=-3+3+3$

Answer:

$f(-1)=3$