1个回答
2011-03-14
展开全部
偏x=(Y/2)x^(Y/2-1)
偏y=x^(Y/2)lnx
偏e=[(xe/e)^(Y/2)]'=(xe)^(Y/2)/[2e^(Y/2)]+(xe)^(Y/2)[-e^(Y/2)/2]=x^(Y/2)/2-xe^Y/2=[x^(Y/2)-xe^Y]/2
偏y=x^(Y/2)lnx
偏e=[(xe/e)^(Y/2)]'=(xe)^(Y/2)/[2e^(Y/2)]+(xe)^(Y/2)[-e^(Y/2)/2]=x^(Y/2)/2-xe^Y/2=[x^(Y/2)-xe^Y]/2
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