1 Prove Induction Natural Numbers N 2 1 Following Identity True 2 Prove Natural Numbers N1 Q37117761

Question 3 and 3
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1. Prove by induction that for all natural numbers n 2 1 the following identity is true: 2. Prove that for all natural numbers n1 we have: 12+22+32 6 3. Prove that for all nEN, n2 + n is even. 4. Prove that for any integer n 2 12, postage of n cents can be made by combining stamps of value 3 and 7 cents.

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