GRE
(-87)^{8}
(\frac{1}{87})^{-8}
\frac{111}{1,111}
\frac{1,111}{11,111}
The number of kilometers in a light-hour
10^{10}
The standard deviation of data set X
The standard deviation of data set Y
\frac{(5!+6!)}{(6!+7!)}
\frac{1}{6}
x
112
m
130
25000 +道题目
241本备考书籍