यदि \(a_1=5\) और \(a_4=625\) है, तथा (r) धनात्मक है, तो \(a_5\) क्या होगा?

If \(a_1=5\) and \(a_4=625\), and (r) is positive, what will \(a_5\) be?

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

D. (3125)

Step 1

Concept

\(625=5r^3\), so \(r^3=125\) and (r=5), hence \(a_5=3125\). First find the ratio and then form the next term.

Step 2

Why this answer is correct

The correct answer is D. (3125). \(625=5r^3\), so \(r^3=125\) and (r=5), hence \(a_5=3125\). First find the ratio and then form the next term.

Step 3

Exam Tip

\(625=5r^3\), इसलिए \(r^3=125\) और (r=5), अतः \(a_5=3125\)। पहले अनुपात निकालें फिर अगला पद बनाएं।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_1=5\) और \(a_4=625\) है, तथा (r) धनात्मक है, तो \(a_5\) क्या होगा? / If \(a_1=5\) and \(a_4=625\), and (r) is positive, what will \(a_5\) be?

Correct Answer: D. (3125). Explanation: \(625=5r^3\), इसलिए \(r^3=125\) और (r=5), अतः \(a_5=3125\)। पहले अनुपात निकालें फिर अगला पद बनाएं। / \(625=5r^3\), so \(r^3=125\) and (r=5), hence \(a_5=3125\). First find the ratio and then form the next term.

Which concept should I revise for this Mathematics MCQ?

\(625=5r^3\), so \(r^3=125\) and (r=5), hence \(a_5=3125\). First find the ratio and then form the next term.

What exam hint can help solve this Mathematics question?

\(625=5r^3\), इसलिए \(r^3=125\) और (r=5), अतः \(a_5=3125\)। पहले अनुपात निकालें फिर अगला पद बनाएं।