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Is the sequence (a_n=2n+(-1)^n) an AP?अनुक्रम (a_n=2n+(-1)^n) समांतर श्रेणी है या नहीं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: No, the consecutive difference changesनहीं, लगातार अंतर बदलता है
The initial terms are (1,5,5,9,\ldots), so the difference is not constant. In exams, test terms containing ((-1)^n) by substituting a few values.प्रारंभिक पद (1,5,5,9,\ldots) देते हैं, इसलिए अंतर स्थिर नहीं है। परीक्षा में ((-1)^n) वाले पदों को कुछ मान रखकर जांचें।
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