1
log(5)(0,5²*100)=log(5)25=2
2
15^(log(15)14²)=14²=196 (1)
3
log(3)0,2²=log(3)0,04 (1)
4
log(3)(0,2²*75)=log(3)(0,04*75)=log(3)3=1
5
log(3)(0,81*100)=log(3)81=4
6
log(2)(80/5)=log(2)16=4
7
9+10:5-4=3 (2)
8
lgz=lg[(l-g)(l+g)/(l+g)²]=lg[(l-g)/(l+g)]
z=(l-g)/(l+g)
9
3:4=0,75
10
5^log(5)2=2