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根号(1-X)在区间[0,1]上的定积分是?
人气:287 ℃ 时间:2020-02-06 00:22:09
解答
=-∫(1-x)^(1/2)d(1-x)
=-(1-x)^(1/2+1)/(1+1/2)
=-(2/3)*(1-x)^(3/2)
x=1,-(2/3)*(1-x)^(3/2)=0
x=0,-(2/3)*(1-x)^(3/2)=-2/3
所以原式=0-(-2/3)=2/3
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