किसी अनुक्रम में \(w_1=1\) और \(w_n=w_{n-1}+3^{n-1}+1\) है। \(w_4\) का मान क्या होगा?
In a sequence, \(w_1=1\) and \(w_n=w_{n-1}+3^{n-1}+1\). What is the value of \(w_4\)?
Explanation opens after your attempt
D. तैंतालीस(43)
Concept
\(w_2=5\), \(w_3=15\), and \(w_4=43\). In exams, add (1) after \(3^{n-1}\) too.
Why this answer is correct
The correct answer is D. तैंतालीस / (43). \(w_2=5\), \(w_3=15\), and \(w_4=43\). In exams, add (1) after \(3^{n-1}\) too.
Exam Tip
\(w_2=5\), \(w_3=15\) और \(w_4=43\) है। परीक्षा में \(3^{n-1}\) के बाद (1) भी जोड़ें।
Login to save your score, XP, coins and progress.
