यदि \(r_1=4\), \(r_2=6\) और \(r_n=2r_{n-1}-r_{n-2}+n\) है, तो \(r_5\) का मान क्या होगा?
If \(r_1=4\), \(r_2=6\), and \(r_n=2r_{n-1}-r_{n-2}+n\), what is the value of \(r_5\)?
Explanation opens after your attempt
B. चौंतीस(34)
Concept
\(r_3=11\), \(r_4=20\), and \(r_5=34\). In exams, do not change the order of the older term being subtracted.
Why this answer is correct
The correct answer is B. चौंतीस / (34). \(r_3=11\), \(r_4=20\), and \(r_5=34\). In exams, do not change the order of the older term being subtracted.
Exam Tip
\(r_3=11\), \(r_4=20\) और \(r_5=34\) मिलता है। परीक्षा में घटाए जाने वाले पुराने पद का क्रम न बदलें।
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