## kimdre10 Group Title use the change of base formula to evaluate the expression log3 30 one year ago one year ago

1. dpaInc

is that $$\large log_330$$ ???

2. kimdre10

yesh

3. slaaibak

$\log_3 30 = \log_3 (10 \times 3) = \log_3 10 + \log_3 3 = {\log_{10} 10 \over \log_{10}} + 1 = {1 \over \log_{10} 3 } +1$

4. slaaibak

Second last step should be: ${\log_{10} 10 \over \log_{10} 3} + 1$