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OpenStudy (anonymous):
evaluate log3(81)
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OpenStudy (anonymous):
Log 3(81) is 4.
OpenStudy (aum):
81 = 9 x 9 = 3 x 3 x 3 x 3 = 3^4 \[\large \log_3(81) = \log_3(3^4) = 4\log_3(3) = 4 * 1 = 4 \]
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