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Log base 3 of 81 is equal to 4, because 3 ^ 4 = 81. Therefore, two times log base 3 of 81 is equal to 2 x 4 = 8.

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Q: Log base 3 of 81 plus log base 3 of 81?
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How do you solve 3 to the power of negative 2x plus 2 equals 81?

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