那XlnX 用分部积分法 怎么写呢
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那XlnX 用分部积分法 怎么写呢
=1/2∫lnxdx^2
=1/2*x^2*lnx-1/2∫x^2dlnx
=1/2*x^2lnx-1/2∫x^2*1/xdx
=1/2*x^2lnx-1/2∫xdx
=1/2*x^2lnx-1/4x^2+C
那XlnX 用分部积分法 怎么写呢
=1/2∫lnxdx^2
=1/2*x^2*lnx-1/2∫x^2dlnx
=1/2*x^2lnx-1/2∫x^2*1/xdx
=1/2*x^2lnx-1/2∫xdx
=1/2*x^2lnx-1/4x^2+C