# The first 3 terms of an arithmetic progression are -1, 0, 1. What is the sum of the first 100 terms.

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justaguide | Certified Educator

The first three terms of an arithmetic progression are -1, 0, 1. The first term is -1 and the common difference is 1.

The sum of the first 100 terms is (100/2)*(2*-1 + 99*1) = 50*97 = 4850

**The sum of the first 100 terms of an arithmetic progression with the first three terms -1, 0, 1 is 4850**