अनुक्रम \(2,22,78,188,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(2,22,78,188,\ldots\)?
Explanation opens after your attempt
A. \(a_n=3n^3-n\)
Concept
\(3n^3-n\) gives (2,22,78,188). In exams test cube-based options with small (n).
Why this answer is correct
The correct answer is A. \(a_n=3n^3-n\). \(3n^3-n\) gives (2,22,78,188). In exams test cube-based options with small (n).
Exam Tip
\(3n^3-n\) से (2,22,78,188) मिलते हैं। परीक्षा में घन आधारित विकल्पों को छोटे (n) से जाँचें।
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