Răspuns:
Explicație pas cu pas:
7
a) log2 8=log2 2³=3
b)log3/2 9/4=2
c)log2 2^(-2)=-2
d)log1/2 2³=log2 2³/log2 1/2=3/(-1)=-3
e)log5 8/125×8=log5 1/5³=-3
f)log√3 (√3)^4·√3=5
g)log2 √2/4=1/2-2=-3/2
8
a) log3 3²=2
b)5
c)2
d)-2
e)-2
f)5
g)-3
h)log4 2√2=log2 √8/log2 4=3/2×1/2=3/4
11
a)log8 2^4×2²=log8 2^6=log2 2^6/log2 8=6/3=2
12
a)log2 24+log2 36-log2 (2·24)-log2 (2·36)=
=log2 24+log2 36-1-log2 24 -1-log2 36=-2
