Each of these logs can be written into log form (that is, log10 form).
(log2x)(log3x)(log4x)(log5x) = [log(x)/log(2)]·[log(x)/log(3)]·[log(x)/log(4)]·[log(x)/log(5)]
= [log(x)]4 / [log(2)·log(3)·log(4)·log(5)]
(log2x)(log3x)(log4x) = [log(x)/log(2)]· [log(x)/log(3)]· [log(x)/log(4)]
= [log(x)]3 / [log(2)·log(3)·log(4)]
]
(log2x)(log3x)(log5x) = [log(x)/log(2)]· [log(x)/log(3)]· [log(x)/log(5)]
= [log(x)]3 / [log(2)·log(3)·log(5)]
(log2x)(log4x)(log5x) = [log(x)/log(2)]· [log(x)/log(4)]· [log(x)/log(4)]
= [log(x)]3 / [log(2)·log(4)·log(5)]
(log3x)(log4x)(log5x) = [log(x)/log(3)]· [log(x)/log(4)]· [log(x)/log(4)]
= [log(x)]3 / [log(3)·log(4)·log(5)]
To get rid of denominators, multiply both sides by [log(2)·log(3)·log(4)·log(5):
---> [log(x)]4 = [log(x)]3 · [log(5)] + [log(x)]3 ·[log(4)] + [log(x)]3 ·[log(3)] + [log(x)]3 ·[log(2)]
= [log(x)]3 · [ log(5) + log(4) + log(3) + log(2) ]
Divide both sides by [log(x)]3
---> log(x) = log(5) + log(4) + log(3) + log(2)
= log( 5 · 4 · 3 · 2 )
= log( 120 )
---> x = 120
Each of these logs can be written into log form (that is, log10 form).
(log2x)(log3x)(log4x)(log5x) = [log(x)/log(2)]·[log(x)/log(3)]·[log(x)/log(4)]·[log(x)/log(5)]
= [log(x)]4 / [log(2)·log(3)·log(4)·log(5)]
(log2x)(log3x)(log4x) = [log(x)/log(2)]· [log(x)/log(3)]· [log(x)/log(4)]
= [log(x)]3 / [log(2)·log(3)·log(4)]
]
(log2x)(log3x)(log5x) = [log(x)/log(2)]· [log(x)/log(3)]· [log(x)/log(5)]
= [log(x)]3 / [log(2)·log(3)·log(5)]
(log2x)(log4x)(log5x) = [log(x)/log(2)]· [log(x)/log(4)]· [log(x)/log(4)]
= [log(x)]3 / [log(2)·log(4)·log(5)]
(log3x)(log4x)(log5x) = [log(x)/log(3)]· [log(x)/log(4)]· [log(x)/log(4)]
= [log(x)]3 / [log(3)·log(4)·log(5)]
To get rid of denominators, multiply both sides by [log(2)·log(3)·log(4)·log(5):
---> [log(x)]4 = [log(x)]3 · [log(5)] + [log(x)]3 ·[log(4)] + [log(x)]3 ·[log(3)] + [log(x)]3 ·[log(2)]
= [log(x)]3 · [ log(5) + log(4) + log(3) + log(2) ]
Divide both sides by [log(x)]3
---> log(x) = log(5) + log(4) + log(3) + log(2)
= log( 5 · 4 · 3 · 2 )
= log( 120 )
---> x = 120
Your work looked very good, maybe there was a simple calculation error in all of your work.