Consider the recurrence relation that arose in Example
Chapter 11, Problem 27E(choose chapter or problem)
Consider the recurrence relation that arose in Example 11.3.7: E1 = 0 and Ek = Ek?1 + k + 1, for all integers k ? 2.a. Use iteration to find an explicit formula for the sequence.b. Use mathematical induction to verify the correctness of the formula.
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