Evaluate log 81 to base 3√3
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log A base b = log a/log b numerator and denominator are to the same base
log 81 = log 3⁴ = 4log 3
log 3root3 = log 3^(3/2) = 3/2 ×log3
4log3 ÷ 3/2 log3
4×2/3 = 8/3
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