यदि \(a_7=2187\) और (r=3) है, तो \(a_1\) का मान क्या है?

If \(a_7=2187\) and (r=3), what is the value of \(a_1\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (3)

Step 1

Concept

\(a_7=a\cdot3^6\), so \(a=2187\div729=3\). In exams, divide the seventh term by \(r^6\).

Step 2

Why this answer is correct

The correct answer is C. (3). \(a_7=a\cdot3^6\), so \(a=2187\div729=3\). In exams, divide the seventh term by \(r^6\).

Step 3

Exam Tip

\(a_7=a\cdot3^6\), इसलिए \(a=2187\div729=3\) है। परीक्षा में सातवें पद से \(r^6\) भाग दें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_7=2187\) और (r=3) है, तो \(a_1\) का मान क्या है? / If \(a_7=2187\) and (r=3), what is the value of \(a_1\)?

Correct Answer: C. (3). Explanation: \(a_7=a\cdot3^6\), इसलिए \(a=2187\div729=3\) है। परीक्षा में सातवें पद से \(r^6\) भाग दें। / \(a_7=a\cdot3^6\), so \(a=2187\div729=3\). In exams, divide the seventh term by \(r^6\).

Which concept should I revise for this Mathematics MCQ?

\(a_7=a\cdot3^6\), so \(a=2187\div729=3\). In exams, divide the seventh term by \(r^6\).

What exam hint can help solve this Mathematics question?

\(a_7=a\cdot3^6\), इसलिए \(a=2187\div729=3\) है। परीक्षा में सातवें पद से \(r^6\) भाग दें।