अनुक्रम \(5,20,45,80,\ldots\) का (n)वाँ पद क्या है?
What is the (n)th term of the sequence \(5,20,45,80,\ldots\)?
Explanation opens after your attempt
A. \(a_n=5n^2\)
Concept
At (n=1,2,3,4), it gives (5,20,45,80). In exams, recognize square-based multiples.
Why this answer is correct
The correct answer is A. \(a_n=5n^2\). At (n=1,2,3,4), it gives (5,20,45,80). In exams, recognize square-based multiples.
Exam Tip
(n=1,2,3,4) पर (5,20,45,80) मिलते हैं। परीक्षा में वर्ग आधारित गुणजों को पहचानें।
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