求不定积分,∫(x^2/(a^2-x^2))dx,谢谢
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∫[(x^2/(a^2-x^2)]dx = ∫[(x^2-a^2+a^2)/(a^2-x^2)]dx
= ∫[-1 + a^2/(a^2-x^2)]dx = -x + (a/2)∫[1/(a+x)+1/(a-x)]dx
= -x + (a/2)ln|(a+x)/(a-x)| + C
= ∫[-1 + a^2/(a^2-x^2)]dx = -x + (a/2)∫[1/(a+x)+1/(a-x)]dx
= -x + (a/2)ln|(a+x)/(a-x)| + C
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