Question: Exercise 2 Show that Va > 0, VX E R, |x - a) Exercise 3 Let S = 12 + 22+ 32+ ...+ n2. Use

Exercise 2 Show that Va > 0, VX E R, |x - a) Exercise 3 Let S = 12 + 22+ 32+ ...+ n2. Use mathematical induction to prove that Sn = n(n + 1)(2n + 1) 6

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