求函数f(x)=³√(x2-1)(3-x)(2x+3)的导数,帮帮忙,谢谢啦
2021-11-21
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f(x) =[(x^2-1)(3-x)(2x+3)]^(1/3)
lnf(x) =(1/3)[ln(x^2-1) +ln(3-x) +ln(2x+3)]
f'(x)/f(x) =(1/3)[2x/(x^2-1) -1/(3-x) +2/(2x+3)]
f'(x) =(1/3)[2x/(x^2-1) -1/(3-x) +2/(2x+3)].[(x^2-1)(3-x)(2x+3)]^(1/3)
lnf(x) =(1/3)[ln(x^2-1) +ln(3-x) +ln(2x+3)]
f'(x)/f(x) =(1/3)[2x/(x^2-1) -1/(3-x) +2/(2x+3)]
f'(x) =(1/3)[2x/(x^2-1) -1/(3-x) +2/(2x+3)].[(x^2-1)(3-x)(2x+3)]^(1/3)
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