Question

Help me please ,question in attachment ...

Answer 1

help

Answer 2

Recall that
\[\log_a b = \frac{\log_c b}{\log_c a}\]

Answer 3

So manipulate your expressions log_a(ab) and get in there an expression log_b(ab)

Answer 4

James J thanks very much
r u on facebook ?

Answer 5

Alternatively, just go back to definitions.

If log_a(ab) = x, then a^x = ab

Hence log_b(ab) = ...