किसी अनुक्रम में \(b_1=7\) और \(b_n=3b_{n-1}-2n+1\) है। \(b_4\) का मान क्या होगा?
In a sequence, \(b_1=7\) and \(b_n=3b_{n-1}-2n+1\). What is the value of \(b_4\)?
Explanation opens after your attempt
B. एक सौ चालीस(140)
Concept
\(b_2=18\), \(b_3=49\), and \(b_4=140\). In exams, check the full subtracted amount after multiplication.
Why this answer is correct
The correct answer is B. एक सौ चालीस / (140). \(b_2=18\), \(b_3=49\), and \(b_4=140\). In exams, check the full subtracted amount after multiplication.
Exam Tip
\(b_2=18\), \(b_3=49\) और \(b_4=140\) है। परीक्षा में गुणा के बाद पूरी घटाई गई राशि जाँचें।
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