Mathematics
Senior High
Resolved
対数関数の問題です。
なぜ最後のlogの部分で底数が揃ってないのに、かけると1になるのですか。
341 次の計算をせよ。
(1) (logs25+log95) (log59+log253)
(1) (log325+ log95) (logs 9+ log 25 3)
logs5(logs 3²+
3
logs 3
log39
log, 25
5
(
=
log35² +
= (21
2 log₁5+
||
5
2
loga5) (2 logs 3+ logs 3)
35
25
log.5-log.3 = 2log 5-log: 3
4
25
4
Answers
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