यदि \(a_4=80\) और (r=2) है तो \(a_9\) का मान क्या होगा?

If \(a_4=80\) and (r=2), what is the value of \(a_9\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (2560)

Step 1

Concept

There are (5) steps from the fourth to the ninth term, so \(a_9=80\cdot2^5=2560\). In exams count the position gap.

Step 2

Why this answer is correct

The correct answer is C. (2560). There are (5) steps from the fourth to the ninth term, so \(a_9=80\cdot2^5=2560\). In exams count the position gap.

Step 3

Exam Tip

चौथे से नौवें पद तक (5) कदम हैं इसलिए \(a_9=80\cdot2^5=2560\) है। परीक्षा में पद-संख्या का अंतर गिनें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_4=80\) और (r=2) है तो \(a_9\) का मान क्या होगा? / If \(a_4=80\) and (r=2), what is the value of \(a_9\)?

Correct Answer: C. (2560). Explanation: चौथे से नौवें पद तक (5) कदम हैं इसलिए \(a_9=80\cdot2^5=2560\) है। परीक्षा में पद-संख्या का अंतर गिनें। / There are (5) steps from the fourth to the ninth term, so \(a_9=80\cdot2^5=2560\). In exams count the position gap.

Which concept should I revise for this Mathematics MCQ?

There are (5) steps from the fourth to the ninth term, so \(a_9=80\cdot2^5=2560\). In exams count the position gap.

What exam hint can help solve this Mathematics question?

चौथे से नौवें पद तक (5) कदम हैं इसलिए \(a_9=80\cdot2^5=2560\) है। परीक्षा में पद-संख्या का अंतर गिनें।