यदि \(a_3=40\) और \(a_5=360\) है, तथा (r) धनात्मक है, तो \(a_7\) क्या होगा?

If \(a_3=40\) and \(a_5=360\), and (r) is positive, what will \(a_7\) be?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (3240)

Step 1

Concept

\(a_5=a_3r^2\), so \(r^2=9\), and \(a_7=a_5r^2=360\cdot9=3240\). The same multiplier applies over the same gap.

Step 2

Why this answer is correct

The correct answer is C. (3240). \(a_5=a_3r^2\), so \(r^2=9\), and \(a_7=a_5r^2=360\cdot9=3240\). The same multiplier applies over the same gap.

Step 3

Exam Tip

\(a_5=a_3r^2\), इसलिए \(r^2=9\), और \(a_7=a_5r^2=360\cdot9=3240\)। समान दूरी पर वही गुणक लगता है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_3=40\) और \(a_5=360\) है, तथा (r) धनात्मक है, तो \(a_7\) क्या होगा? / If \(a_3=40\) and \(a_5=360\), and (r) is positive, what will \(a_7\) be?

Correct Answer: C. (3240). Explanation: \(a_5=a_3r^2\), इसलिए \(r^2=9\), और \(a_7=a_5r^2=360\cdot9=3240\)। समान दूरी पर वही गुणक लगता है। / \(a_5=a_3r^2\), so \(r^2=9\), and \(a_7=a_5r^2=360\cdot9=3240\). The same multiplier applies over the same gap.

Which concept should I revise for this Mathematics MCQ?

\(a_5=a_3r^2\), so \(r^2=9\), and \(a_7=a_5r^2=360\cdot9=3240\). The same multiplier applies over the same gap.

What exam hint can help solve this Mathematics question?

\(a_5=a_3r^2\), इसलिए \(r^2=9\), और \(a_7=a_5r^2=360\cdot9=3240\)। समान दूरी पर वही गुणक लगता है।