यदि \(a_1=100\) और (a_{n+1}=a_n-\(2^n+n^2+n\)) है तो \(a_4\) क्या होगा?
If \(a_1=100\) and (a_{n+1}=a_n-\(2^n+n^2+n\)), what is \(a_4\)?
Explanation opens after your attempt
D. (66)
Concept
The subtracted values are (4,10,20), so \(a_4=100-34=66\). Exam tip: add the power, square, and (n) before subtracting.
Why this answer is correct
The correct answer is D. (66). The subtracted values are (4,10,20), so \(a_4=100-34=66\). Exam tip: add the power, square, and (n) before subtracting.
Exam Tip
घटने वाले मान (4,10,20) हैं इसलिए \(a_4=100-34=66\) है। घात, वर्ग और (n) तीनों को पहले जोड़ें।
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