यदि \(a_1=7\) और \(a_{n+1}=a_n+n^2+n\) है तो कौन सा पद (47) है?
If \(a_1=7\) and \(a_{n+1}=a_n+n^2+n\), which term is (47)?
Explanation opens after your attempt
B. (5)वाँ(5)th
Concept
The terms are (7,9,15,27,47), so (47) is the fifth term. Exam tip: write changing additions to check the position.
Why this answer is correct
The correct answer is B. (5)वाँ / (5)th. The terms are (7,9,15,27,47), so (47) is the fifth term. Exam tip: write changing additions to check the position.
Exam Tip
पद (7,9,15,27,47) हैं इसलिए (47) पाँचवाँ पद है। बदलते जोड़ लिखकर पद संख्या जाँचें।
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