GRE
$$x^{2} - y^{2}$$
5
The number $$b$$ such that $$f(b)$$ is the minimum value of $$f$$
$$-3$$
$$(27)^{-8}$$
$$(81)^{-6}$$
$$\sqrt{( 10^{2m} )( 10^{2n} )}$$
$$10^{mn}$$
m + n
2m
25000 +道题目
256本备考书籍