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Calculate the logarithm to base 9 of 3-4 * 9...

Calculate the logarithm to base 9 of 3-4 * 92 * (81)-1

A.

2

B.

zero

C.

-2

D.

-4

Correct answer is C

34×92×811=log9(34×92×811)=log9(134×92×181)=log9(181×811×181)=log9181=log9192=log992=2log992×1=2