помогите, пожалуйста (: 2 и 3 номер

3) log(30)^2x вышло...

4а)корень из b*кубичный корень из а

3) 1

не распишите?

x

log30(x)=1/(logx(5)+logx(2)+logx(3))

(log2(x)log3(x)log5(x))*(logx(5)+logx(2)+logx(3))=

=log2(x)log3(x)+log3(x)log5(x)+log5(x)log2(x)

ответ 1

благодарю!

2)log12(27)=a;log6(16)=?
log12(3^3)=3log3(3)/log3(12)=3/(log3(3)+2log3(2))=3/(1+2log3(2))=a
3=a+2alog3(2)
log3(2)=(3-a)/2a
log6(16)=4log6(2)=4log3(2)/log3(6)=
4log3(2)/(1+log3(2))=4(3-a)/2a:(1+(3-a)/2a)=
2(3-a)/a:(a+3)/2a=2(3-a)/a*2a/a+3=
4(3-a)/(3+a)
3)a)log30(x)=1/logx(30)=
1/(logx(5)+logx(2)+logx(3))
b)1/(log2(x)log3(x)log5(x))
*1/(logx(5)+logx(2)+logx(3))=
log2(x)log3(x)+log3(x)
log5(x)+log5(x)log2(x)
c)(log2(x)log3(x)+log3(x)
log5(x)+log5(x)log2(x)):
(log2(x)log3(x)+log3(x)
log5(x)+log5(x)log2(x))
=1