Question

Sabendo que log2=0,3 é log3=0,4,calcule;
A)log 8. C)log 5. E)log3000
B)log 12. D)log 200


HELP MEEEE

Answer 1

log 8=

8=2.2.2=2^3
log 2^3=
3.log2=
3.0,3=
0,9

log 5=

5=10/2
log 10=1

log 5=
log10/2=
log 10-log 2=
1-0,3=
0,7


log 3000=

log 1000=3

log 3000=
log3.1000=
log 3 + log 1000=
0,4+3=
3,4

log 12=
12=2.2.3=2^2.3
log12=
log2^2.3=
log2^2+log3=
2.log2+log3=
2.0,3+0,4=
0,6+0,4=
1

log 200=

log 100 = 2

log200=
log 2.100=
log 2+ log 100=
0,3+2=
2,3