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7^8–7^7+7^6 is divisible by 43
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7^8–7^7+7^6 is divisible by 43

User Bwinton
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5 votes

We have


7^8-7^7+7^6=7^6(7^2-7+1)=7^6\cdot43

so
7^8-7^7+7^6 is a multiple of/divisible by 43.

User Jerska
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