अनुक्रम \(9,7,10,6,\ldots\) के लिए कौन सा पुनरावर्ती नियम सही है?
Which recursive rule is correct for the sequence \(9,7,10,6,\ldots\)?
Explanation opens after your attempt
A. (a_1=9, a_{n+1}=a_n+(-1)^n(n+1))
Concept
For (n=1), (-2) is added; for (n=2), (+3); and for (n=3), (-4). This alternating rule is correct.
Why this answer is correct
The correct answer is A. (a_1=9, a_{n+1}=a_n+(-1)^n(n+1)). For (n=1), (-2) is added; for (n=2), (+3); and for (n=3), (-4). This alternating rule is correct.
Exam Tip
(n=1) पर (-2), (n=2) पर (+3) और (n=3) पर (-4) जुड़ता है। यही वैकल्पिक नियम सही है।
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