GRE
$$<2a, 4b>$$
$$<4a, 2b+1>$$
The sum of the first n positive prime numbers
The sum of the first n positive integers
The number of different prime factors of $$n$$
4
m
5
$$R$$
$$0$$
The remainder when $$3^{4n+2}+5$$ is divided by 10
The smallest integer $$n$$, $$n \gt 2$$, such that $$n-2$$ is divisible by $$3$$, $$4$$, $$5$$, and $$6$$
$$362$$
$$S$$
51
$$y-x$$
3
$$x-k$$
$$(-2)^{-5}$$
-1
x
y
$$f(x+4)-f(x)$$
12
25000 +道题目
236本备考书籍