अनुक्रम \(7,16,31,52,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(7,16,31,52,\ldots\)?
Explanation opens after your attempt
C. \(a_n=3n^2+4\)
Concept
\(3n^2+4\) gives (7,16,31,52). In exams check a quadratic rule when second differences are constant.
Why this answer is correct
The correct answer is C. \(a_n=3n^2+4\). \(3n^2+4\) gives (7,16,31,52). In exams check a quadratic rule when second differences are constant.
Exam Tip
\(3n^2+4\) से (7,16,31,52) मिलते हैं। परीक्षा में दूसरे अंतर समान हों तो वर्गीय नियम जाँचें।
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