अनुक्रम \(12,17,22,27,\ldots\) में (57) कौन-सा पद है?
In the sequence \(12,17,22,27,\ldots\), which term is (57)?
Explanation opens after your attempt
C. (10)वाँ(10)th
Concept
(a_n=12+(n-1)5=5n+7), so (5n+7=57) gives (n=10). Set the rule equal to the given term to find its position.
Why this answer is correct
The correct answer is C. (10)वाँ / (10)th. (a_n=12+(n-1)5=5n+7), so (5n+7=57) gives (n=10). Set the rule equal to the given term to find its position.
Exam Tip
(a_n=12+(n-1)5=5n+7), इसलिए (5n+7=57) से (n=10)। दिए पद की स्थिति के लिए नियम को बराबर रखें।
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