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[" difference "d" is given by "d=S(n)-kS...

[" difference "d" is given by "d=S_(n)-kS_(n-1)+3n-2" ,"],[" (a) "1],[" 10.The first and last term of an A.P.are "a" and "l" respectively.If "S" is the sum of all the "],[" terms of the A.P.and the common difference is given by "(l^(2)-a^(2))/(k-(l+a))" ,then "k=],[" (a) "S]

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