Đáp án:

`P = log_a ((a^2.\sqrt{b})/(c^3)) `

`= log_a ((a^2 .b^(1/2))/(c^3))`

`= log_a (a^2 .b^(1/2)) - log_a c^3`

`= 2log_a a +1/2log_a b -3log_a c`

`= 2+1/2 .2 -3.3`

`= 2+1-9`

`= -6`