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[" Let "a(1),a(2),...,,,a(n)" be a given...

[" Let "a_(1),a_(2),...,,,a_(n)" be a given A.P.whose "],[" common difference is an integer and "],[S_(n)=a_(1)+a_(2)+.....+a_(n)" .If "a_(1)=1,a_(n)=300" and "],[15<=n<=50" ,then the ordered pair "],[(S_(n-4),a_(n-4))" is equal to: "]

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