अनुक्रम \(4,15,32,55,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,15,32,55,\ldots\)?
Explanation opens after your attempt
A. \(a_n=3n^2+2n-1\)
Concept
\(3n^2+2n-1\) gives (4,15,32,55). In exams test options with small values of (n).
Why this answer is correct
The correct answer is A. \(a_n=3n^2+2n-1\). \(3n^2+2n-1\) gives (4,15,32,55). In exams test options with small values of (n).
Exam Tip
\(3n^2+2n-1\) से (4,15,32,55) मिलते हैं। परीक्षा में विकल्पों को छोटे (n) मानों से जाँचें।
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