What is the value of $1^{-2}+2^{-1}$ ?
(A) $\frac{3}{2}$
(B) $\frac{1}{27}$
(C) 4
(D) -4
(E) 9
By definition, $1^{-2}+2^{-1}=\frac{1}{1^{2}}+\frac{1}{2^{1}}=\frac{1}{1}+\frac{1}{2}=\frac{3}{2}$.

ANSWER: (A)