अनुक्रम \(3,5,9,15,23,\ldots\) में (12)वाँ पद क्या होगा?
What will be the (12)th term in the sequence \(3,5,9,15,23,\ldots\)?
Explanation opens after your attempt
B. (135)
Concept
Here \(a_n=n^2-n+3\), so \(a_{12}=144-12+3=135\). Exam tip: identify the formula from initial differences.
Why this answer is correct
The correct answer is B. (135). Here \(a_n=n^2-n+3\), so \(a_{12}=144-12+3=135\). Exam tip: identify the formula from initial differences.
Exam Tip
यहाँ \(a_n=n^2-n+3\) है इसलिए \(a_{12}=144-12+3=135\) है। शुरुआती अंतरों से सूत्र पहचानें।
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