अनुक्रम (a_n=2n+(-1)^n) समांतर श्रेणी है या नहीं?
Is the sequence (a_n=2n+(-1)^n) an AP?
Explanation opens after your attempt
B. नहीं, लगातार अंतर बदलता हैNo, the consecutive difference changes
Concept
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.
Why this answer is correct
The correct answer is B. नहीं, लगातार अंतर बदलता है / No, the consecutive difference changes. 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.
Exam Tip
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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