गुणोत्तर श्रेढ़ी में \(a_2=25\) और \(a_5=675\) है। धनात्मक (r) के लिए \(a_4\) क्या होगा?

In a geometric progression, \(a_2=25\) and \(a_5=675\). For positive (r), what will \(a_4\) be?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (225)

Step 1

Concept

\(a_5=a_2r^3\), so \(675=25r^3\) and (r=3), hence \(a_4=25\cdot3^2=225\). Find the ratio first.

Step 2

Why this answer is correct

The correct answer is B. (225). \(a_5=a_2r^3\), so \(675=25r^3\) and (r=3), hence \(a_4=25\cdot3^2=225\). Find the ratio first.

Step 3

Exam Tip

\(a_5=a_2r^3\), इसलिए \(675=25r^3\) और (r=3), अतः \(a_4=25\cdot3^2=225\)। पहले अनुपात निकालें।

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गुणोत्तर श्रेढ़ी में \(a_2=25\) और \(a_5=675\) है। धनात्मक (r) के लिए \(a_4\) क्या होगा? / In a geometric progression, \(a_2=25\) and \(a_5=675\). For positive (r), what will \(a_4\) be?

Correct Answer: B. (225). Explanation: \(a_5=a_2r^3\), इसलिए \(675=25r^3\) और (r=3), अतः \(a_4=25\cdot3^2=225\)। पहले अनुपात निकालें। / \(a_5=a_2r^3\), so \(675=25r^3\) and (r=3), hence \(a_4=25\cdot3^2=225\). Find the ratio first.

Which concept should I revise for this Mathematics MCQ?

\(a_5=a_2r^3\), so \(675=25r^3\) and (r=3), hence \(a_4=25\cdot3^2=225\). Find the ratio first.

What exam hint can help solve this Mathematics question?

\(a_5=a_2r^3\), इसलिए \(675=25r^3\) और (r=3), अतः \(a_4=25\cdot3^2=225\)। पहले अनुपात निकालें।