यदि \(D_1=5\) और (D_n=3D_{n-1}-(n+1)) है, तो \(D_4\) का मान क्या होगा?
If \(D_1=5\) and (D_n=3D_{n-1}-(n+1)), what is the value of \(D_4\)?
Explanation opens after your attempt
B. इक्यानवे(91)
Concept
\(D_2=12\), \(D_3=32\), and \(D_4=91\). In exams, do not forget to subtract (n+1).
Why this answer is correct
The correct answer is B. इक्यानवे / (91). \(D_2=12\), \(D_3=32\), and \(D_4=91\). In exams, do not forget to subtract (n+1).
Exam Tip
\(D_2=12\), \(D_3=32\) और \(D_4=91\) मिलता है। परीक्षा में (n+1) को घटाना न भूलें।
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