Answer:
1/9
Step-by-step explanation:
a - b = 2
27^(1/3b)/9^(1/2a)
so...b = a - 2
27^( (1/3) b ) / 9^((1/2) a )
= (3^3)(1/3b) over (3^2)^(1/2a)
= 3^b over 3^a = 3^ (b - a) = 3^(-2) = 1/9
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9^(1/2b)/3^a = (9^(1/2))^b / 3^a = 3^b / 3^a = 3^(b -a) = 3^-2 = 1/9
