Question

How do you solve `(log_5 20^4)*(log_20 5^4)`?

Answer 1

`log_5(20^4)*log_20(5^4)=16`

Explanation:

`log_5(20^4)*log_20(5^4)`

= `log20^4/log5*log5^4/log20`

= `(4cancellog20)/cancellog5*(4cancellog5)/cancellog20`

= `4xx4=16`