logarytmy
Pati: Oblicz, wiedząc, że:
expa (x) = a x
a) exp2 (log2 5)=
b) exp2 (log4 9)
7 cze 17:25
Basia:
log
ab=c ⇔ a
c=b
a
logab=a
c=b
alogab=b
exp
2(log
25)=2
log25=5
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
| | log29 | | log29 | |
log49= |
| = |
| |
| | log24 | | 2 | |
exp
2(log
49)=2
log49=2
log292 =
(2
log29)
12 = 9
12=
√9=3
7 cze 17:35