Use mathematical induction to prove: 3 is a factor of n^3 + 2n
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Hello Let P(n) be the property "3 is a factor of " therefore P(1) is true Let's suppose P(n) true and demonstrate that P(n+1) is true P(n) supposed true => 3 is a factor of 3 is clearly a factor of Therefore 3 is a factor of P(n+1) is true
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