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Sequence Question (Important)

Please help me for answered this question

Note by Fadlan Semeion
4 years, 5 months ago

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an=[(n^2+8n+10)/(n+9)]= [(n-1) +19/(n+9) ], therefore sum gives 1+2+3+......+29 + 10= 29*30/2 + 10 = 445

Nidhin Kurian - 4 years, 5 months ago

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