यदि \(a_1=180\) और (a_{n+1}=a_n-(6n+5)) है तो \(a_4\) क्या होगा?
If \(a_1=180\) and (a_{n+1}=a_n-(6n+5)), what is \(a_4\)?
Explanation opens after your attempt
A. (136)
Concept
The subtracted values are (11,17,23), so \(a_4=129\). Exam tip: calculate the linear subtraction before subtracting.
Why this answer is correct
The correct answer is A. (136). The subtracted values are (11,17,23), so \(a_4=129\). Exam tip: calculate the linear subtraction before subtracting.
Exam Tip
घटने वाले मान (11,17,23) हैं इसलिए \(a_4=129\) है। सही विकल्पों में (129) होना चाहिए।
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