Question: The first two terms in an arithmetic progression are 2 and 9. The last term in the progression is the only number that is greater

The first two terms in an arithmetic progression are 2 and 9. The last term in the progression is the only number that is greater than 150. Find the sum of all the terms in the progression.

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Let the common difference of the arithmetic progression be d Then the third term is 2 d the four... View full answer

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