Question

leo

第九題的算式要怎麼寫

8. 化簡 log4
log 28-log 15
Elegz
28
15
2
7. * (log23+ log49) (log34-log92)
(log 3 log 9 log4 lagz.
+
lag 4) (-
Dog 3-Togg
=
3
+3 log4
log4
-2 1084 14
3-loy14)
(log 3-light) + 3. (lb-loy))
2 log 2
2 logz
3
=
utab
Jags
legz
rday 3
+
play 2
)(Log4
2
(love) (lage 73.
logz
log 2-legis
2692
legz
eg3-7g9
-
2 x 28
3 log4+lay-193 +195-2 + 3 - B 14+
legal-logis - loyz - logiy
2log2
-log 4-logs + logs?
9.設a=log23,b=log37,試以a, b表 log621=【
·】。
1+9
Baz+lasz-log3 +1
1092-la+
1ogr-40g3
10. 解方程式 log2 (x-1)=log4(x2+14x-26),則x=【3】。

Answer 1

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小熊🧸

用換底公式就好囉！

leo

謝謝 我懂了