Question

ぱそこん

どうして底5の対数をとることが出来るのですか？

gol
gol01.5
=301
+ log 103 = 10 log 10 10+ log 103 = 10 10 10 30
1+log 103-10-10 log 103 = 10-3=30
362 (1) 5l0g57 =7
(2) 101+10
別解 101+10g
(3) 361086 √5
=
log
=62log 6√5
101>
=6
=610g65
log65=5
(4) 7 10 494-70822-7210g 492
log
=
=(72) 108 492 49
= 49 log 49 2
別解 10g494
=
log 74
log749
>S
log 492=2
2
log4=log,4

(1) 50857
=7
Mogs 7 = X2α.
両辺人底ちの対数をとると
10g
1957
Logs 5 flags X
=
1
logs X
logy 7 lugs X X=7
+