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 \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

D. (66)

Step 1

Concept

The subtracted values are (4,10,20), so \(a_4=100-34=66\). Exam tip: add the power, square, and (n) before subtracting.

Step 2

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.

Step 3

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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Mathematics Answer, Explanation and Revision Hints

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 \(a_4\)?

Correct Answer: D. (66). Explanation: घटने वाले मान (4,10,20) हैं इसलिए \(a_4=100-34=66\) है। घात, वर्ग और (n) तीनों को पहले जोड़ें। / The subtracted values are (4,10,20), so \(a_4=100-34=66\). Exam tip: add the power, square, and (n) before subtracting.

Which concept should I revise for this Mathematics MCQ?

The subtracted values are (4,10,20), so \(a_4=100-34=66\). Exam tip: add the power, square, and (n) before subtracting.

What exam hint can help solve this Mathematics question?

घटने वाले मान (4,10,20) हैं इसलिए \(a_4=100-34=66\) है। घात, वर्ग और (n) तीनों को पहले जोड़ें।