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Question: exercise 23 using the principle of mathematical induction as above...

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Exercise 2.3. Using the principle of mathematical induction, as above, prove that the following equalities hold for every positive integer n. 1. The sum of the first n integers: 1+2+3++n- 2. The sum of the squares of the first n integers: 12+22+3++1)(2n +1)
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