If (18^a) * 9^(3a – 1)= (2^3)(3^b) and a and b are positive integers, what is the value of a? Answers.
A) 22	B) 11	C) 9	D) 6	E) 3
18^a) * 9^(3a – 1)= (2^3)(3^b)   = 2^a . 9^a . 9^(3a – 1) = (2^3)(3^b)   Just compare powers of 2 from both sides (no need to calculate powers of 3, 9 as value of b is not asked)   Answer = 3   ANSW3R:3
<result>E</result>
If (18^a) * 9^(3a – 1)= (2^3)(3^b) and a and b are positive integers, what is the value of a?