A1. Which of the following numbers is negative?
(A) $(-1)^{200}$
(B) $-\frac{(-2)^{3}}{2}$
(C) $-(-3)^{12}$
(D) $(-1-1)^{10}$
(E) $-(-3)$
A1 Since $(-3)^{12}=3^{12}>0$, it follows that $-(-3)^{12}<0$. The other numbers are positive.