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If (1+2+3+\cdots+n=946), choose the value of (n).यदि (1+2+3+\cdots+n=946) है तो (n) का मान चुनिए।
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (43)(43)
(S_{43}=\frac{43\times44}{2}=946), so (n=43). Match (2S_n) with the product of two consecutive numbers.(S_{43}=\frac{43\times44}{2}=946) इसलिए (n=43) है। (2S_n) को दो क्रमागत संख्याओं के गुणनफल से मिलाएं।
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