GRE
$$\sqrt{( 10^{2m} )( 10^{2n} )}$$
$$10^{mn}$$
The length of PQ
The length of PE
The number of points (a, b) on circle C where both a and b are integers
The number of points (a, b) on circle D where both a and b are integers
|x-y|
3
$$QR$$
$$RS$$
$$(x-y)^{2}$$
$$x^{2}+y^{2}$$
The square of the average (arithmetic mean) of $$x$$, $$y$$ and $$z$$
The average (arithmetic mean) of $$x^{2}$$,$$y^{2}$$and $$z^{2}$$
25000 +道题目
236本备考书籍