यदि \(a_1=40\) और \(a_{n+1}=a_n-3n\) है तो \(a_4\) क्या होगा?
If \(a_1=40\) and \(a_{n+1}=a_n-3n\), what is \(a_4\)?
Explanation opens after your attempt
D. (22)
Concept
The terms are (40,37,31,22), so \(a_4=22\). Exam tip: calculate (3n) separately before subtracting.
Why this answer is correct
The correct answer is D. (22). The terms are (40,37,31,22), so \(a_4=22\). Exam tip: calculate (3n) separately before subtracting.
Exam Tip
पद (40,37,31,22) हैं इसलिए \(a_4=22\) है। घटाव में (3n) का मान अलग-अलग निकालें।
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