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If the terms of the arithmetic sequence 2/9,3/9,4/9,5/9,..... are represented as `x_(1), x_(2), x_(3),.... ` then
a)`x_(1)+x_(2)+x_(3) = ..` b)`x_(4)+x_(5)+x_(6) =…….`
c) Find the sum of first 9 terms.
d) What is the sum of first 300 terms?

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