GRE

x-y

z+t

The average of the least and greatest numbers in list S

6

$$\frac{r}{x}$$

n-2

n

52

d

s

The number of integer solutions of the equation $$3x^{2}+5x-2=0$$

1

r-p

t-s

25000 +道题目

139本备考书籍