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18 February, 19:56

Which expression is equivalent to 3^2*3^-5 A. 1/3^3 B. 1/3^7C. 1/3^-3D. 1/3^-7

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  1. 18 February, 20:37
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    We have known a^m * a^n = a^m+n

    So we have 3^2 * 3^-5 = 3^ (2-5) = 3^-3=1: (3^3) = 1/27

    We choose A

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