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∫1/(X+1)(X+3) dx.

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/24 13:48:24
∫1/(X+1)(X+3) dx.
∫ dx/[(x + 1)(x + 3)]
= (1/2)∫ [(x + 3) - (x + 1)]/[(x + 1)(x + 3)] dx
= (1/2)∫ [1/(x + 1) - 1/(x + 3)] dx
= (1/2)[ln| x + 1 | - ln| x + 3 |] + C
= (1/2)ln| (x + 1)/(x + 3) | + C
= ln√[(x + 1)/(x + 3)] + C