Longest Arithmetic ProgressionBookmark Suggest Edit
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we have formulas of arithmetic progression
Sn=n/2(2a+(n-1)d) (or) n/2(a+l)
Tn=a+(n-1)d
arithmetic mean =a+c/2
Sn=n/2(2a+(n-1)d) (or) n/2(a+l)
Tn=a+(n-1)d
arithmetic mean =a+c/2
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