अनुक्रम \(4,7,12,21,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,7,12,21,\ldots\)?
Explanation opens after your attempt
A. \(a_n=2^n+n+1\)
Concept
\(2^n+n+1\) gives (4,7,12,21). In exams also check the extra (n) in power-based rules.
Why this answer is correct
The correct answer is A. \(a_n=2^n+n+1\). \(2^n+n+1\) gives (4,7,12,21). In exams also check the extra (n) in power-based rules.
Exam Tip
\(2^n+n+1\) से (4,7,12,21) मिलते हैं। परीक्षा में घात वाले नियमों में अतिरिक्त (n) भी जाँचें।
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