अनुक्रम \(3,10,21,36,55,\ldots\) का सामान्य पद \(a_n=2n^2+n\) है। (11)वाँ पद क्या होगा?
The sequence \(3,10,21,36,55,\ldots\) has general term \(a_n=2n^2+n\). What will be the (11)th term?
Explanation opens after your attempt
Correct Answer
A. (253)
Concept
\(a_{11}=2\times11^2+11=253\). Exam tip: square and multiply first, then add.
Why this answer is correct
The correct answer is A. (253). \(a_{11}=2\times11^2+11=253\). Exam tip: square and multiply first, then add.
Exam Tip
\(a_{11}=2\times11^2+11=253\) है। वर्ग और गुणा पहले करके अंत में जोड़ें।
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