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11 July, 09:55

Prove that 3^17-3^15+3^13 is divisible by 73.

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  1. 11 July, 12:32
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    3^13*73

    Step-by-step explanation:

    3^17-3^15+3^13 So you factor out 3^13

    =3^13 (3^4-3^2+1)

    3^4-3^2+1=73

    3^13*73

    Is this RSM?
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