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数学
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求1/(1-x^2)dx的不定积分
人气:486 ℃ 时间:2020-02-04 10:30:49
解答
原式=1/2*∫[2/(1+x)(1-x) dx
=1/2*∫[1/(1-x)-1/(1+x)]dx
=1/2*∫[-1/(x-1)-1/(1+x)]dx
=-1/2*[;n|x-1|+ln|x+1|]+C
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