题目内容

已知一个等差数列的第5项等于10,前3项的和等于3,那么这个等差数列的公差为() (A)3 (B)1 (C)-1 (D)-3

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函数Y=f(x)的图像与函数Y=2x的图像关于直线Y=x对称,则f(x)=()

A. 2x
B. l092X(X>0)
C. 2X
D. lg(2x)(X>0)

Anyone who wants to can call any timepiece a clock,but technically speaking,only_________0ne rings out the time actually deserves the name.

A. whenever
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过曲线y=2x2-1上一点P(1,1)处的切线的斜率是() (A)4 (B)3 (C)1 (D)-4

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