solve
`|[1,log_(4)2,log_(8)2],[log_(2)4,1,log_(8)4],[log_(2)8,log_(2)8,1]|=0`

log_(2)log_(3)log_(4)(x-1)>0

log_(3)(5+x)+log_(8)8=2^(2)

" 4) "log_(8)1+log_(8)2+log_(8)8=log_(8)(1+2+3)

3sqrt(log_(2)x)-log_(2)8x+1=0

Evaluate log_(3)4.log_(4)5.log_(5)6.log_(6)7.log_(7)8.log_(8)9

(log_(2)x)^(2)+4(log_(2)x)-1=0

(1)/(log_(3)2)+(2)/(log_(9)4)-(3)/(log_(27)8)=0

det [[log_ (2) 512, log_ (4) 3log_ (3) 8, log_ (3) 9]] xxdet [[log_ (2) 3, log_ (8) 3log_ (3) 4, log_ (3) 4 ]] =