GRE
$$a^{c-d}$$
$$b^{d-c}$$
x+$$\frac{1}{x}$$
y+$$\frac{1}{y}$$
$$\sqrt{(x^{2})(y^{5})}$$
$$\sqrt{(x^{3})(y^{5})}$$
$$x^{2}$$$$z^{2}$$
$$y^{4}$$
$$2^{4}$$+$$\sqrt{x}$$
$$4^{2}$$+$$\sqrt{x^{2}}$$
$$3^{12}$$
$$5^{8}$$
$$2^{-2002}$$ + $$2^{-2003}$$
$$2^{-2004}$$
$$n^{10}$$
$$n^{12}$$
The average (arithmetic mean) of $$2^{n}$$,$$2^{n+1}$$,$$2^{n+2}$$,$$2^{n+3}$$,$$2^{n+4}$$
The median of $$2^{n}$$,$$2^{n+1}$$,$$2^{n+2}$$,$$2^{n+3}$$,$$2^{n+4}$$
The average (arithmetic mean) of the numbers in P
The median of the numbers in P
$$(\frac{1}{3})^{n}$$
$$(\frac{1}{10})^{n}$$
25000 +道题目
236本备考书籍
