(log₂5+log, 25) (log59+10g253)
log,25 log, 9
= log₂5+
log,9
=
||
log,52
log₂5+ 10g, 5²
log, 9
= (log, 5+log₂5)
= (108,5 + 2106,5 10,5 * 2108,5
2
1
5+
+
log,5 2log
=2log,5
log,3
log,5 log, 25
5
21og₂5
log,9
log₂3
+
log, 5 log,5²
4
1
+
2log 5 2log 5)
.=5