कौन सा क्रम \(a_n=5n^2\) से बनता है?
Which sequence is formed by \(a_n=5n^2\)?
Explanation opens after your attempt
B. (5,20,45,80)
Concept
Putting (n=1,2,3,4) gives (5,20,45,80). Multiply \(n^2\) by (5).
Why this answer is correct
The correct answer is B. (5,20,45,80). Putting (n=1,2,3,4) gives (5,20,45,80). Multiply \(n^2\) by (5).
Exam Tip
(n=1,2,3,4) रखने पर (5,20,45,80) मिलते हैं। \(n^2\) को (5) से गुणा करें।
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