यदि \(a_1=100\) और \(a_{n+1}=a_n-n^2\) है तो कौन सा पद (70) है?
If \(a_1=100\) and \(a_{n+1}=a_n-n^2\), which term is (70)?
Explanation opens after your attempt
B. (5)वाँ(5)th
Concept
The terms are (100,99,95,86,70), so (70) is the fifth term. Exam tip: subtract squares in order.
Why this answer is correct
The correct answer is B. (5)वाँ / (5)th. The terms are (100,99,95,86,70), so (70) is the fifth term. Exam tip: subtract squares in order.
Exam Tip
पद (100,99,95,86,70) हैं इसलिए (70) पाँचवाँ पद है। घटते वर्गों को क्रम से लगाएँ।
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