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问题: 不定积分

解答:

令arcsinx=t,则x=sint
原式=∫tcostdt/[1-(sint)^2]^(3/2)
=∫tcostdt/(cost)^3
=∫tdt/(cost)^2
=∫tdtant
=ttant-∫tantdt
=ttant-ln|sect|+C
=arcsinx/(√x^2-1)+ln(√x^2-1)/|x|+C