Question

ごわみ

囲んだところなのですが どうしてこのように変形できますか

(1) 1632 =(29(2)=2.2=2°=8
(2) ¥5×5+5=53.5*x5-53+一-5キ=/5
(3) log:6 + log212-2log23 =log,6+ log212 -log23° = log2
= log,8 = log22°=3
log.9
logs27
2
(4) 1ogy9=
3
1og2x
log,8
(5) 80825
=xとおくと。
log。x= log25
-log25
. log2x=Dlog25
開 8g 5 -(23og,s* -2*#logg3 _2mg,5 -5
iog25
log:5 log27 log:8
log24 log225 log281
log2
(6) log,5-1og25 27 - loga 8
2
log.5 31og23
2log,54log23
3
1-3-
2
2-2-
(7) (log23 + log,27)(log,4 + log,2}
log24
1og:2 10g
log23
log23* \/
2
log22
(g3+ g +)-(og.3 +
log23 +
log24
log,9
I1