यदि \(a_n=n^2+cn\) और \(a_4=32\) है तो \(a_9\) का मान क्या होगा?

If \(a_n=n^2+cn\) and \(a_4=32\), what will be the value of \(a_9\)?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

D. (117)

Step 1

Concept

From (16+4c=32), (c=4). Therefore \(a_9=81+36=117\).

Step 2

Why this answer is correct

The correct answer is D. (117). From (16+4c=32), (c=4). Therefore \(a_9=81+36=117\).

Step 3

Exam Tip

(16+4c=32) से (c=4) है। इसलिए \(a_9=81+36=117\) होगा।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=n^2+cn\) और \(a_4=32\) है तो \(a_9\) का मान क्या होगा? / If \(a_n=n^2+cn\) and \(a_4=32\), what will be the value of \(a_9\)?

Correct Answer: D. (117). Explanation: (16+4c=32) से (c=4) है। इसलिए \(a_9=81+36=117\) होगा। / From (16+4c=32), (c=4). Therefore \(a_9=81+36=117\).

Which concept should I revise for this Mathematics MCQ?

From (16+4c=32), (c=4). Therefore \(a_9=81+36=117\).

What exam hint can help solve this Mathematics question?

(16+4c=32) से (c=4) है। इसलिए \(a_9=81+36=117\) होगा।