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If (S_n=7260), what will be the value of (n)?यदि (S_n=7260) है तो (n) का मान क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (120)(120)
(S_{120}=\frac{120\times121}{2}=7260), so (n=120). Match (2S_n) with the product of consecutive numbers.(S_{120}=\frac{120\times121}{2}=7260) इसलिए (n=120) है। (2S_n) को क्रमागत संख्याओं के गुणनफल से मिलाएं।
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