GRE
x+y
500
m
-2
$$\frac{1}{3^{n}}$$
$$3(\frac{1}{4^{n}})$$
The average age of all of the people in the club
25.9
The greatest distance from P to a point on the circle plus the least distance from P to a point on the circle
4
$$x^{4}y^{3}$$
0
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
The ones digit of x+y
5
The value of n if at least one of the groups consists of 3 people
6
x
$$x$$
$$y$$
$$(-1)^{p}$$
-1
25000 +道题目
236本备考书籍