Question

Express $log135$ in terms of $m$ and $n$ if $m=log15$ and $n=log3$.

• A. 2mn
• B. m + 2n
• C. 2m + n
• D. m + n

Answer 1

The correct option is

B

$m+2n$

$log135=log(15\times 3\times 3)$

$=log15+log3+log3$

$=log15+2log3$

$=m+2n$