अनुक्रम \(3,8,19,46,\ldots\) के लिए कौन सा पुनरावर्ती नियम सही है?
Which recursive rule is correct for the sequence \(3,8,19,46,\ldots\)?
Explanation opens after your attempt
D. \(a_1=3, a_2=8, a_n=2a_{n-1}+a_{n-2}\)
Concept
\(2\times8+3=19\) and \(2\times19+8=46\). Exam tip: both starting terms must be correct in a two-term rule.
Why this answer is correct
The correct answer is D. \(a_1=3, a_2=8, a_n=2a_{n-1}+a_{n-2}\). \(2\times8+3=19\) and \(2\times19+8=46\). Exam tip: both starting terms must be correct in a two-term rule.
Exam Tip
\(2\times8+3=19\) और \(2\times19+8=46\) है। दो-पद नियम में दोनों शुरुआती पद सही होने चाहिए।
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