Concept explainers
A common example of a recursive formula is one to compute the sum of the first n integers, 1 + 2 + 3 + … + n. The recursive formula can be expressed as
1 + 2 + 3 + … + n = n + (1 + 2 + 3 + … + (n – 1))
Write a static method that implements this recursive formula to compute the sum of the first n integers. Place the method in a test
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