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1、 y=(2e)^(-x) y'=(2e)^(-x)*(-x)' =-(2e)^(-x) 2、 y'=(x^3)'*ln(1/x)+x^3*[ln(1/x)]' =3x^2*ln(1/x)+x^3*1/(1/x)*(1/x)' =3x^2*ln(1/x)+x^4*(-1/x^2) =3x^2*ln(1/x)-x^2
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