(3) log。30 - 1og215、/2
(4) log26 + log212-2log23
(5) 4log53 - 2log 5 15 -log545
(6) 4log2/2 - log23 + log2
V3
2
2
E
log23 =a, log25 =b とするとき,次の式を a, bで表せ。
(2) log210
6
(1) log215
(3) log20.3
(4) log1615
( logs2t Pog832 21 0g345-2g35 31 Dog>30-Jops1512