求y=x+2倍根号1-x的值域
写详细点噢~
人气:223 ℃ 时间:2020-02-06 04:29:34
解答
定义域(-无穷,1)
求导,y’ = √(1-x) + (-x-2) / [2√(1-x)]
当x=0时有极大值,也是最大值.y max=2
所以值域(-无穷,2]
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