Question

ちょる

3行目から4行目の式の導き方ってどーやるんですか？

7:20
logx
x (log x + 1)
ligx = txtcx. = dx = dt
よって、(年式) = dt
S.
1
dr
=
=
S (¹ - ==-₁) de
= t - log|t+1| + c.
x
(CHR)
logx-log/lgx+1|+ c