If (1/2)^18 (1/81)^k = 1/18^18, then k =  Answers.
A) 9
B) 12
C) 16
D) 24
E) 36
I'm going to focus on denominator only..   (2^18) . ((3^4)^k = 18^18   (2^18) . ((3^4k) = (2. 3^2)^18   (2^18) . ((3^4k) = (2^24) . (3^2)^18   hence   4k = 36   k = 9   answer 9   I hope it's quite clear
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If (1/2)^18 (1/81)^k = 1/18^18, then k =