\( 1 \leftarrow \quad \) Use the change-of-base theorem to find the logarithm. \( \log _{4} 9 \)
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To find \( \log_{4} 9 \) using the change-of-base theorem, you can convert it to base 10 (or natural logarithm). The formula is: \[ \log_{4} 9 = \frac{\log_{10} 9}{\log_{10} 4} \] Using a calculator for logarithmic values: \(\log_{10} 9 \approx 0.954\) and \(\log_{10} 4 \approx 0.602\). Therefore, \[ \log_{4} 9 \approx \frac{0.954}{0.602} \approx 1.585 \] This means the logarithm of 9 to the base 4 is approximately 1.585! To make it even more engaging, consider how this change-of-base method is like taking a train to a different station. You can start at one base (your original base, like base 4) and hop on a base-10 train to arrive at your destination (the answer)! Plus, it works for any bases, so you can always find your route!