不定积分习题9到4 x(根号x+1)dx打错了,是定积分习题:积分号9到4 x(根号下x+1)dx=
问题描述:
不定积分习题9到4 x(根号x+1)dx
打错了,是定积分习题:积分号9到4 x(根号下x+1)dx=
答
$x[(x)^(1/2)+1)]dx
=$[(x^(3/2)+x]dx
=(5/2)*x^(5/2)+x^2/2(积分号9到4)
=(5/2)*(9)^(5/2)+(9)^2/2-(5/2)*(4)^(5/2)+(4)^2/2
=1169/10