SOLUTION: The sum of an A.P. is 20, the first term being 8 and the common difference – 2. Find the number of terms in the series.

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Question 1047953: The sum of an A.P. is 20, the first term being 8 and the common difference – 2. Find the number of terms in the series.
Answer by ikleyn(52788) About Me  (Show Source):
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The number of terms in the series is 4.

The AP is 8, 6, 4 and 2.