If (1/2)^16 (1/81)^k = 1/18^16, then k =
Choose one.
A) 8 B) 12 C) 16 D) 24 E) 36
I'm going to focus on denominator only..   (2^16) . ((3^4)^k = 18^16   (2^16) . ((3^4k) = (2. 3^2)^16   (2^16) . ((3^4k) = (2^24) . (3^2)^16   hence   4k =32   k = 8   answer 8   I hope it's quite clear
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If (1/2)^16 (1/81)^k = 1/18^16, then k =