यदि \(a_1=3\) और \(a_5=243\) है, तो धनात्मक सार्व अनुपात क्या होगा?

If \(a_1=3\) and \(a_5=243\), what will be the positive common ratio?

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

B. (3)

Step 1

Concept

\(a_5=a_1r^4\), so \(243=3r^4\) and \(r^4=81\), hence (r=3). When positive ratio is asked, take the positive root.

Step 2

Why this answer is correct

The correct answer is B. (3). \(a_5=a_1r^4\), so \(243=3r^4\) and \(r^4=81\), hence (r=3). When positive ratio is asked, take the positive root.

Step 3

Exam Tip

\(a_5=a_1r^4\), इसलिए \(243=3r^4\) और \(r^4=81\), अतः (r=3)। धनात्मक अनुपात मांगने पर धनात्मक मूल लें।

Question me issue ya doubt hai?

Answer, explanation, typing mistake ya suggestion directly hamari team ko bhejein. 📱Helpline (Call / WhatsApp): +91 7272824365

Related Mathematics Questions

FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=3\) और \(a_5=243\) है, तो धनात्मक सार्व अनुपात क्या होगा? / If \(a_1=3\) and \(a_5=243\), what will be the positive common ratio?

Correct Answer: B. (3). Explanation: \(a_5=a_1r^4\), इसलिए \(243=3r^4\) और \(r^4=81\), अतः (r=3)। धनात्मक अनुपात मांगने पर धनात्मक मूल लें। / \(a_5=a_1r^4\), so \(243=3r^4\) and \(r^4=81\), hence (r=3). When positive ratio is asked, take the positive root.

Which concept should I revise for this Mathematics MCQ?

\(a_5=a_1r^4\), so \(243=3r^4\) and \(r^4=81\), hence (r=3). When positive ratio is asked, take the positive root.

What exam hint can help solve this Mathematics question?

\(a_5=a_1r^4\), इसलिए \(243=3r^4\) और \(r^4=81\), अतः (r=3)। धनात्मक अनुपात मांगने पर धनात्मक मूल लें।