## The sum of the first five terms of an arithmetic sequence is 150 and the sum of the first ten terms is 550. (b) What is the eighth ter

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## Answers ( )

/* Subtract equation (1) from Equation (2) , we get*/

/* Put d = 10 in equation (1) , we get */

/* We know that , */

Therefore.,

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sum of first five terms of AP = 150

sum of first ten terms of AP = 550