यदि \(a_1=200\) और (a_{n+1}=a_n-\(2^n+n^2\)) है तो \(a_4\) क्या होगा?
If \(a_1=200\) and (a_{n+1}=a_n-\(2^n+n^2\)), what is \(a_4\)?
Explanation opens after your attempt
C. (172)
Concept
The subtracted values are (3,8,17), so \(a_4=172\). Exam tip: calculate both the power and square before subtracting.
Why this answer is correct
The correct answer is C. (172). The subtracted values are (3,8,17), so \(a_4=172\). Exam tip: calculate both the power and square before subtracting.
Exam Tip
घटने वाले मान (3,8,17) हैं इसलिए \(a_4=172\) है। घात और वर्ग दोनों निकालकर घटाएँ।
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