ln(1-x^2)的二阶导数怎么做

2025-04-07 04:12:12
推荐回答(1个)
回答1:

ln’(1-x^2)=-2x/(1-x^2)=1/(x+1)+1/(x-1)
ln’'(1-x^2)=(1/x+1)‘+(1/(x-1))’
=-1/(x+1)^2-1/(x-1)^2