यदि गुणोत्तर श्रेढ़ी में \(a_2=10\) और \(a_4=250\) है, तो धनात्मक (r) के लिए \(a_1+a_5\) क्या होगा?

If a geometric progression has \(a_2=10\) and \(a_4=250\), what will \(a_1+a_5\) be for positive (r)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (1252)

Step 1

Concept

\(a_4=a_2r^2\), so (r=5), \(a_1=2\), and \(a_5=1250\), hence the sum is (1252). Find (r) first.

Step 2

Why this answer is correct

The correct answer is B. (1252). \(a_4=a_2r^2\), so (r=5), \(a_1=2\), and \(a_5=1250\), hence the sum is (1252). Find (r) first.

Step 3

Exam Tip

\(a_4=a_2r^2\), इसलिए (r=5), \(a_1=2\) और \(a_5=1250\), अतः योग (1252) है। पहले (r) निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि गुणोत्तर श्रेढ़ी में \(a_2=10\) और \(a_4=250\) है, तो धनात्मक (r) के लिए \(a_1+a_5\) क्या होगा? / If a geometric progression has \(a_2=10\) and \(a_4=250\), what will \(a_1+a_5\) be for positive (r)?

Correct Answer: B. (1252). Explanation: \(a_4=a_2r^2\), इसलिए (r=5), \(a_1=2\) और \(a_5=1250\), अतः योग (1252) है। पहले (r) निकालें। / \(a_4=a_2r^2\), so (r=5), \(a_1=2\), and \(a_5=1250\), hence the sum is (1252). Find (r) first.

Which concept should I revise for this Mathematics MCQ?

\(a_4=a_2r^2\), so (r=5), \(a_1=2\), and \(a_5=1250\), hence the sum is (1252). Find (r) first.

What exam hint can help solve this Mathematics question?

\(a_4=a_2r^2\), इसलिए (r=5), \(a_1=2\) और \(a_5=1250\), अतः योग (1252) है। पहले (r) निकालें।