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If (S_n=7875), what is the value of (S_{n-7})?यदि (S_n=7875), तो (S_{n-7}) का मान क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (7503)(7503)
(7875=S_{125}), so (S_{118}=\frac{118\cdot119}{2}=7021). The listed options should be checked carefully.(7875=S_{125}), इसलिए (S_{118}=\frac{118\cdot119}{2}=7021) नहीं है। सही गणना (S_{118}=7021) देती है।
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