函数两端取绝对值再取对数ln|y|=1/3*[ln|x+1|+ln(x^2+2)-ln|x|-2ln|2x-1|]两端对x求导y'/y=1/3*[1/(x+1)+2x/(x^2+2)-1/x-2*2/(2x-1)]故y'=y*1/3*[1/(x+1)+2x/(x^2+2)-1/x-2*2/(2x-1)]即y'=[(x+1)(x^2+2)/x(2x-1)^2]^...