Question 0401c

Arithmetic and Geometric Progressions (APs, GPs)
AP III

Question

Consider the arithmetic series
5+0+5+- 5 + 0 + 5 + \ldots
Find the least value of n{n} for which the sum of the first n{n} terms of the series exceeds 1000.{1000.}

Attempt

Least n={n=}

Answer

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