यदि \(b_n=2b_{n-1}+n\) और \(b_3=19\) है, तो \(b_1\) का मान क्या होगा?
If \(b_n=2b_{n-1}+n\) and \(b_3=19\), what is the value of \(b_1\)?
Explanation opens after your attempt
B. तीन(3)
Concept
\(b_3=4b_1+7\), so \(b_1=3\). In exams, expand the recursive rule up to the first term.
Why this answer is correct
The correct answer is B. तीन / (3). \(b_3=4b_1+7\), so \(b_1=3\). In exams, expand the recursive rule up to the first term.
Exam Tip
\(b_3=4b_1+7\), इसलिए \(b_1=3\) है। परीक्षा में पुनरावर्ती नियम को प्रथम पद तक फैलाएँ।
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