Which expression represents the change of base formula for log7(15)\log_{7}(15)log7(15)?
log(7)log(15)\frac{\log(7)}{\log(15)}log(15)log(7)
log(15)−log(7)\log(15) - \log(7)log(15)−log(7)
log(15)log(7)\frac{\log(15)}{\log(7)}log(7)log(15)
15⋅log(7)15 \cdot \log(7)15⋅log(7)