SOLUTION: Find the sum of the first twenty terms of the arithmetic sequence given that the tenth term is 39 and the sum of the ten terms is 165

SOLUTION: Find the sum of the first twenty terms of the arithmetic sequence given that the tenth term is 39 and the sum of the ten terms is 165

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Question 1089974: Find the sum of the first twenty terms of the arithmetic sequence given that the tenth term is 39 and the sum of the ten terms is 165
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

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You know that,

Substituting,

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So,

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