A1. Let the function $f(x)=x^{3}-3 x^{2}+1$. The value of the expression $f(2)+2 f(0)$ is equal to:
(A) 0
(B) $f(-1)$
(C) 5
(D) $f(1)$
(E) None of the above.
A1. First, we have $f(2)=-3$ and $f(0)=1$ and $f(2)+2 f(0)=-1$. Since $f(-1)=-3$ and $f(1)=-1$, it follows that $f(2)+2 f(0)=f(1)$.