GRE
IxI
y
|x|-|y|
0
The greatest possible value of $$\frac{5}{x-y}, where 6 ≤ x ≤ 7 and -1 ≤ y ≤ 5$$
5
(4x)(3(-2x+1))
(4)(3x)(1-2x)
$$n^{2}$$
4m
x
x+y-1
x-y+1
The area of a circular region with radius $$r$$
The area of a circular region with radius $$r^{2}$$
25000 +道题目
198本备考书籍