# Chapter 4 - Exponential and Logarithmic Functions - Exercise Set 4.2: 121

A possible question that would help might be: " Is 81 a power of 3$?''$

#### Work Step by Step

If you recognize 81 as a power of 3, $81=3^{4}$, then you can evaluate the logarithm using the basic property $\log_{b}b^{x}=x$. Namely, $\log_{3}3^{4}=4$ So a possible question that would help might be: " Is 81 a power of 3$?''$

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