यदि \(x_1=1\) और \(x_n=2x_{n-1}+n^2\) है, तो \(x_3\) का मान क्या होगा?
If \(x_1=1\) and \(x_n=2x_{n-1}+n^2\), what is the value of \(x_3\)?
Explanation opens after your attempt
C. इक्कीस(21)
Concept
\(x_2=6\) and \(x_3=21\). In exams, double the previous term before adding the square.
Why this answer is correct
The correct answer is C. इक्कीस / (21). \(x_2=6\) and \(x_3=21\). In exams, double the previous term before adding the square.
Exam Tip
\(x_2=6\) और \(x_3=21\) मिलता है। परीक्षा में वर्ग जोड़ने से पहले पिछले पद को दोगुना करें।
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