a) (3^3:3^-1/2)^-2=
a)
(3^3:3^-1/2)^-2 =[3^(3+1/2)]^-2 = [3^(3,5)]^-2 = 3^-7 =(1/3)^7
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a)
(3^3:3^-1/2)^-2 =[3^(3+1/2)]^-2 = [3^(3,5)]^-2 = 3^-7 =(1/3)^7