यदि \(d_1=1\) और \(d_n=d_{n-1}+3n\) है, तो \(d_n>40\) पहली बार किस (n) पर होगा?
If \(d_1=1\) and \(d_n=d_{n-1}+3n\), for which (n) will \(d_n>40\) first occur?
Explanation opens after your attempt
C. पाँच(5)
Concept
\(d_4=28\) and \(d_5=43\), so the condition is first satisfied at (n=5). In exams, choose the first term that crosses the limit.
Why this answer is correct
The correct answer is C. पाँच / (5). \(d_4=28\) and \(d_5=43\), so the condition is first satisfied at (n=5). In exams, choose the first term that crosses the limit.
Exam Tip
\(d_4=28\) और \(d_5=43\), इसलिए पहली बार (n=5) पर शर्त पूरी होती है। परीक्षा में सीमा पार करने वाला पहला पद चुनें।
Login to save your score, XP, coins and progress.
