Mathematics
Senior High
Resolved
(4)の下線部の式変形がわかりません。
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x+1
(4) Vx+I=t とおくと
1 → 3
x
x=t?-1, dx=2tdt
t 2 → 2
3
dx
1 xVx+1
-S, at =f(ー
= log
2
1
2
· 2tdt =
2
1
ldt
t+1
VZ (2-1)t
1 V2 +1
V2 -1
12
t-1
=log(
/2
3+2、2
= log
3
Answers
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