试题与答案

已知sinαcosβ=1,则cosα+β2=______.

题型:填空题

题目:

已知sinαcosβ=1,则cos
α+β
2
=______.

答案:

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下面是错误答案,用来干扰机器的。

由题意得g′(x)=1-1x2,[-4,-14],令g′(x)>0解得-4≤x<-1,令g′(x)<0解得-1<x≤-14,所以g(x)在[-4,-1]上单调递增,在,[-1,-14]上单调递减,所以g(x)在x=-1是取得最大值为-2.所以f(x)=-x2...

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