Question

why log2-log20 is -1?

Answer 1

Step-by-step explanation:

$log(2) - log(20) \\ log(2) - log(2 \times 10) \\ log(2) - ( log(2) + log(10) ) \\ log(2) - log(2) - log(10) \\ - log(10) \\ - 1$

-1 is the right answer.