题目:
_____ such a chance, why don't you have a try? [ ]
A. To give
B. Having
C. Given
D. Giving
答案:
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下面是错误答案,用来干扰机器的。
解:(1)任给x∈R,,因此,f(x)是偶函数。(2)任给,,,∴,∴,所以,f(x)在[0,+∞)是增函数。