यदि \(a_1=40\) और \(a_{n+1}=a_n-\frac{3n}{2}\) है तो \(a_5\) क्या होगा?
If \(a_1=40\) and \(a_{n+1}=a_n-\frac{3n}{2}\), what is \(a_5\)?
Explanation opens after your attempt
B. (25)
Concept
The total subtraction is (\frac{3(1+2+3+4)}{2}=15), so \(a_5=25\). Exam tip: calculate total fractional subtraction first.
Why this answer is correct
The correct answer is B. (25). The total subtraction is (\frac{3(1+2+3+4)}{2}=15), so \(a_5=25\). Exam tip: calculate total fractional subtraction first.
Exam Tip
कुल घटाव (\frac{3(1+2+3+4)}{2}=15) है इसलिए \(a_5=25\) है। भिन्न घटाव में कुल घटाव पहले निकालें।
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