GRE
The area of the circular region
$$\frac{y^{2}}{4}$$
The range of set T
n
The standard deviation of the numbers 45, 64, 83, and 53
The standard deviation of the numbers 55, 81, 47, and 62
$$C_{12}$$
($$49^{7}$$)$$C_{26}$$
The sum of the terms in the sequence
51
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236本备考书籍