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[" (1) If the sum of the first "n" terms...

[" (1) If the sum of the first "n" terms of an AP is "4n-n^(2)" ,what is the first term (that is "S_(1))?" What "],[" is the sum of first two terms? What is the second term? Similarly,find the "3" rd ,the "10" th and "],[" the "n" th terms."]

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