GRE
The thousands digit of $$\frac{n}{8}$$
$$7$$
x
2
M
1
$$\frac{1}{\frac{1}{a}+\frac{1}{15}+\frac{1}{14}+\frac{1}{13}+\frac{1}{12}}$$
$$\frac{1}{\frac{1}{b}+\frac{1}{15}+\frac{1}{14}+\frac{1}{13}+\frac{1}{12}}$$
100$$y^{2}$$
225($$y^{2}$$ - 1)
$$x^{-3}$$+$$y^{-3}$$
$$(x+y)^{-3}$$
The product of the three roots
-2
The number of points in plane P whose distance from line l is 2 and whose distance from point Q is 3
4
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