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9^(n)+3^(n) is divisible by 6

11. 9n+3n 9^{n}+3^{n} is divisible by 66

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Full solution

Q. 11. 9n+3n 9^{n}+3^{n} is divisible by 66
  1. Check divisibility for n=0n=0: Let's check if 9n+3n9^n + 3^n is divisible by 66 for n=0n = 0.90+30=1+1=29^0 + 3^0 = 1 + 1 = 2.22 is not divisible by 66.

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