定积分0到1∫xln(x+1)等于多少 求过程

2024-11-19 00:36:49
推荐回答(3个)
回答1:

简单计算一下即可,答案如图所示

回答2:


如图

回答3:

∫xln(x+1)dx
=∫ln(x+1)d(1/2*x^2)
=1/2×x^2×ln(x+1)-1/2×∫x^2dln(x+1)
=1/2×x^2×ln(x+1)-1/2×∫x^2/(x+1)dx
=1/2×x^2×ln(x+1)-1/2×∫[x-1+1/(x+1)]dx
=1/2×x^2×ln(x+1)-1/2×[1/2×x^2-x+ln(x+1)]+C
=1/2×(x^2-1)×ln(x+1)-1/4×(x^2-2x)+C
代入结果为1/4.