9^x÷27^y= 3^(2x) ÷ 3^(3y) = 3^(2x-3y) = 3^3 = 27
9=3^2
所以9^x=3^2^x=3^2x
若2x-3y=3,則9^x÷27^y= ?(A)1 (B)3 (C)9 (D)2..-阿摩線上測驗