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 \(b_1\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. तीन(3)

Step 1

Concept

\(b_3=4b_1+7\), so \(b_1=3\). In exams, expand the recursive rule up to the first term.

Step 2

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.

Step 3

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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Mathematics Answer, Explanation and Revision Hints

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 \(b_1\)?

Correct Answer: B. तीन / (3). Explanation: \(b_3=4b_1+7\), इसलिए \(b_1=3\) है। परीक्षा में पुनरावर्ती नियम को प्रथम पद तक फैलाएँ। / \(b_3=4b_1+7\), so \(b_1=3\). In exams, expand the recursive rule up to the first term.

Which concept should I revise for this Mathematics MCQ?

\(b_3=4b_1+7\), so \(b_1=3\). In exams, expand the recursive rule up to the first term.

What exam hint can help solve this Mathematics question?

\(b_3=4b_1+7\), इसलिए \(b_1=3\) है। परीक्षा में पुनरावर्ती नियम को प्रथम पद तक फैलाएँ।