यदि \(a_1=210\) और (a_{n+1}=a_n-(7n+6)) है तो \(a_4\) क्या होगा?
If \(a_1=210\) and (a_{n+1}=a_n-(7n+6)), what is \(a_4\)?
Explanation opens after your attempt
A. (150)
Concept
The subtracted values are (13,20,27), so \(a_4=150\). Exam tip: calculate (7n+6) before subtracting.
Why this answer is correct
The correct answer is A. (150). The subtracted values are (13,20,27), so \(a_4=150\). Exam tip: calculate (7n+6) before subtracting.
Exam Tip
घटने वाले मान (13,20,27) हैं इसलिए \(a_4=150\) है। घटाने से पहले (7n+6) निकालें।
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