How do you calculate log_5 7 * log_7 8 * log_8 625?

1 Answer
Konstantinos Michailidis
May 16, 2016

It is

log_5 7 * log_7 8 * log_8 625= log7/log5*log8/log7*log625/log8= cancellog7/log5*cancellog8/cancellog7*log625/cancellog8= log625/log5=log5^4/log5=(4*log5)/log5=4

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