f(x) = e^4 x + e^-7 x 求导

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f(x)=e^4x+e^-7x求导f(x)=e^4x+e^-7x求导f(x)=e^4x+e^-7x求导f''(x)=4e^4x-7e^(-7x)

f(x) = e^4 x + e^-7 x 求导
f(x) = e^4 x + e^-7 x 求导

f(x) = e^4 x + e^-7 x 求导
f ' (x)=4e^4x-7e^(-7x)