Mathematics
Senior High
Resolved
ピンクのところはなぜ2条に変化しているのでしょうか。
△ 407 次の計算をせよ。
2
14log: 3-log: 18
(3)* log20.5 log40.5-logs 0.5
(5) (logs 25+ log, 5) (log59+ log253)
(7) (log62)2+log62. log69+ (log63)²
(2) log 1 (3-√5) + log1 (3+√5
log,29+log23-log½ 243
(4),
1
(6) log26 log36-(log23+ log32)
(8)* log37 (log29-log43) log72
V
(6) log26 log36-(log23+ log32)
Sol=
log26
=
10820log23
log2 3-
log22
(log26)2
10
=
log23
-log23
log23
log23
=
HO(log26)2- (log23)2-1
(log22+log23)2- (log23)² - 1
{log2 (2.3)}-(log23)²-18
=
log23
log23
=
log23
(1+log23)2- (log23)2-1
log239
2log23
=
= 2
log₂ 3
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