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I=â«dx-â«â1-x^2dx
=x-xâ1-x^2+â«xdâ1-x^2
=x-xâ1-x^2+â«-x^2/â1-x^2dx
=x-xâ1-x^2+â«(1-x^2-1)/â1-x^2dx
=x-xâ1-x^2+â«â1-x^2dx+â«dx/â1-x^2
=x-xâ1-x^2+â«â1-x^2dx+arcsinx
æ以ï¼
I=x-xâ1-x^2+[(1/2)xâ1-x^2-(1/2)arcsinx]+arcsinx
=x-(1/2)xâ1-x^2+(1/2)arcsinx
代å
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