Mathematics, 24.02.2020 23:39, ruchierosanp1n3qw

For each of the following claims, prove or disprove the claim:
(a) For the domain of all 3-digit numbers n, if the sum of the digits of n is divisible by 9, then n is divisible by 9.
(b) For natural numbers n, n² + n + 17 is always prime.

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For each of the following claims, prove or disprove the claim: (a) For the domain of all 3-digit numbers n, if the sum of the digits of n is divisible by 9, then n is divisible by 9. (b) For natural numbers n, n² + n + 17 is always prime.

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For each of the following claims, prove or disprove the claim:
(a) For the domain of all 3-digit numbers n, if the sum of the digits of n is divisible by 9, then n is divisible by 9.
(b) For natural numbers n, n² + n + 17 is always prime.