rodasellisoyn9oj rodasellisoyn9oj

15-12-2017
Mathematics

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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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chudung1976 chudung1976

25-12-2017

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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