यदि \(a_1=84\) और \(a_{n+1}=\frac{a_n}{2}-n\) है तो \(a_3\) क्या होगा?
If \(a_1=84\) and \(a_{n+1}=\frac{a_n}{2}-n\), what is \(a_3\)?
Explanation opens after your attempt
C. (19)
Concept
\(a_2=42-1=41\) and \(a_3=\frac{41}{2}-2=18.5\). Check steps carefully before choosing integer options.
Why this answer is correct
The correct answer is C. (19). \(a_2=42-1=41\) and \(a_3=\frac{41}{2}-2=18.5\). Check steps carefully before choosing integer options.
Exam Tip
\(a_2=42-1=41\) और \(a_3=\frac{41}{2}-2=18.5\) नहीं है। सरल विकल्पों से बचने के लिए चरण जाँचें।
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