Question

4,5,6 решитеееееееее...

Answer 1

4)log8(12)-log8(15)+log8(20)=log8((12*20)/15=log8((12*4)/3)=log8(16)=log2^3(2^4)=
4/3=1,1/3
5)5^3log2(5)=5^log2(5^3)=
5^3=125
6)5^2-log5(9)=(5^2)/5^log5(9)=25/9=2,7/9