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f(x)=³√(3x/4π)的导数

题目详情
f(x)=³√(3x/4π)的导数
▼优质解答
答案和解析
f(x)=[3x/(4π)]^(1/3)=(3/4π)^(1/3)*x^(1/3)
f'(x)=(3/4π)^(1/3)*1/3*x^(-2/3)
=1/[6^(2/3)*π^(1/3)*x^(2/3)]
用对数法也可:
lnf(x)=ln[3x/(4π)]^(1/3)
=1/3*ln[3x/(4π)]
1/f(x)*f'(x)=1/3*4π/(3x)*3/(4π)
f'(x)=1/(3x)*[3x/(4π)]^(1/3)