10) не понятно условие
11) условие не переписываю log10(2^3)-log10(24))/(log10(3/27)=log(8/24)/log10(1/9)=log10(1/3)/log10((1/3)^2)=log10(1/3)/2log10(1/3)=1/2
12)log3(2)+3log(1/4)/(log3(28/7)=log3(2)+3log(2^-2)/log3(4)=log3(2)-6log3(2)/2log3(2)=log3(2)(1-6)/2log3(2)=-5/2=-2.5
13)log6(12)+2log6(2))/(1/3log6(27)+log6(4)=log6(12*4)/(1/3log6(3^3)+log6(2^4))=
log6(48)/log6(48)=1
14) log 0.3(16)/log0.3(15/30)=log0.3(2^4)/log0.3(2^-1)=4log0.3(2)/(-log0.3(2)=-4