B=A*C and if B=1 A and C should be reciprocals but why can't they both be negative? (I think because we have logC (base A) in the question, correct?)

Hi Siva, we will get 8 as the answer if A and C are positive only. I think since in the question logC (base A) is defined hence A and C can only be positive. Is it correct? Or is there any other reason for A and C to be positive?

Mister logical, logarithm of negative number doesnt exist, so both a,b and c should be greater than zero.

i too got 16 as  the answer

i too got 16 as  the answer