GRE
$$(27)^{-8}$$
$$(81)^{-6}$$
m + n
2m
$$x^{-1}yz^{-2}$$
$$(\frac{xz}{y})^{-2}$$
The average (arithmetic mean) of x and y
y-1
The total number of points P in the xy-plane such that the distance between P and one of the axes is 10 and the distance between P and the other axis is 8
The total number of points Q in the xy-plane such that the distance between Q and one of the axes is 5 and the distance between Q and the other axis is 4
25000 +道题目
198本备考书籍