Question: Use mathematical induction to prove that a + (a + d) + (a + 2d) + + [a + (n 1)d] - n(n-1) 2 =

Use mathematical induction to prove thata + (a + d) + (a + 2d) + + [a

a + (a + d) + (a + 2d) + + [a + (n 1)d] - n(n-1) 2 = na + d dn

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