5
log(1/√3)2tgπ/6/(1-tg²π/6)=log(1/√3)tgπ/3=log(1/√3)√3=-1
ответ 1
6
lof(8)9,8=lg(7²*2*0,1)/log2³=(2lg7+lg2-1)/3lg2=(a+2b-1)/3a
ответ 2
7
log(4)3+2log(4)3+3log(4)3+4log(4)3+5log(4)3=15log(4)3
ответ 4
8
log(5)(125*√5*√a*b:∛c²)=
=log(5)125+1/2*log(5)5+1/2*log(5)a+log(5)b-2/3*log(5)c=
=3+1/2+1/2*log(5)a+log(5)b-2/3*log(5)c=3,5+1/2*log(5)a+log(5)b-2/3*log(5)c
Ответ 1