अनुक्रम \(10,18,28,40,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(10,18,28,40,\ldots\)?
Explanation opens after your attempt
D. \(a_n=n^2+5n+4\)
Concept
\(n^2+5n+4\) gives (10,18,28,40). In exams test the rule on the first four terms.
Why this answer is correct
The correct answer is D. \(a_n=n^2+5n+4\). \(n^2+5n+4\) gives (10,18,28,40). In exams test the rule on the first four terms.
Exam Tip
\(n^2+5n+4\) से (10,18,28,40) मिलते हैं। परीक्षा में पहले चार पदों पर नियम जाँचें।
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