Write the expression as the logarithm of a single number or expression with a coefficient of 1. Assume all variables represent positive numbers. log 9 + log 63 - log 7

Answer 1

log9 = log3^2 = 2log3

log63 = log(9x7) = log9 + log7 = 2log3 + log7

log9 + log63 -log7 = 2log3 + 2log3 +log7-log7 = 4log3

4log3 = log(3^4) = log81