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[" If the "n" th term of an arithmetic p...

[" If the "n" th term of an arithmetic progression is "2n-1" ,then "],[" what is the sum upto "n" terms? "],[[" (a) "n^(2)," (b) "n^(2)-1],[" (c) "n^(2)+1," (d) "(1)/(2)n(n+1)]]

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