SOLUTION: Find the number of terms in an Arithmetic Progression whose first term is 5 common difference 3 and sum is 55

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Question 1047955: Find the number of terms in an Arithmetic Progression whose first term is 5 common difference 3 and sum is 55
Answer by ikleyn(52790) About Me  (Show Source):
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n = 5.

The AP is 5, 8, 11, 14, 17.

The sum of the first 5 terms is 55.