由链式法则
y=f(g(x))的导数为
y'=f'(g(x))*g'(x)
=f'(x^(1/2))*(x^(1/2))'
=1/2*x^(-1/2)*f'(x^(1/2))
不是2(x)^(1/2)f'(x^1/2)
追答不是
是对X求导 不是对根号下X求导
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如图所示：
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