1. f(x)=x^3lnx 求f '(e) 2. f(x)=ln(x^2+4) 求f ' (1) ... 4.y(x)=ln(e^x-3x) 求y'(0) y'(x)=(e^ x-3x)'/(e^x-3x) ... 5.y(x) ...
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