GRE
$$\frac{8^28^{-4}}{8^3}$$
$$\frac{1}{2^{15}}$$
$$x^{-10}$$
$$x^{-20}$$
Twice the sum of the interior angles of polygon P
The sum of the interior angles of polygon Q
$$\sqrt{r^6}$$
$$r^3$$
The area of circle C
13π
$$ (-1)^x$$
$$ (-1)^{-x}$$
$$f(n+1)-f(n)$$
0
$$x$$
$$y$$
25000 +道题目
240本备考书籍