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数学
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函数f(x)=x^2-2ax-2在区间【1,2】上是单调函数,则a属于什么范围
人气:499 ℃ 时间:2019-10-23 06:52:22
解答
求导f‘(x)=2x-2a
f‘(x)图像过点(a,0)
f(x)在区间[1,2]上是单调函数
∴ a≤ 1或a≥2
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