यदि \(a_4=135\) और (r=3) है तो पहला पद (a) क्या होगा?

If \(a_4=135\) and (r=3), what is the first term (a)?

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Correct Answer

B. (5)

Step 1

Concept

\(a_4=ar^3\), so \(135=a\cdot27\) and (a=5). In exams divide the fourth term by \(r^3\).

Step 2

Why this answer is correct

The correct answer is B. (5). \(a_4=ar^3\), so \(135=a\cdot27\) and (a=5). In exams divide the fourth term by \(r^3\).

Step 3

Exam Tip

\(a_4=ar^3\) इसलिए \(135=a\cdot27\) और (a=5) है। परीक्षा में चौथे पद से \(r^3\) भाग दें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_4=135\) और (r=3) है तो पहला पद (a) क्या होगा? / If \(a_4=135\) and (r=3), what is the first term (a)?

Correct Answer: B. (5). Explanation: \(a_4=ar^3\) इसलिए \(135=a\cdot27\) और (a=5) है। परीक्षा में चौथे पद से \(r^3\) भाग दें। / \(a_4=ar^3\), so \(135=a\cdot27\) and (a=5). In exams divide the fourth term by \(r^3\).

Which concept should I revise for this Mathematics MCQ?

\(a_4=ar^3\), so \(135=a\cdot27\) and (a=5). In exams divide the fourth term by \(r^3\).

What exam hint can help solve this Mathematics question?

\(a_4=ar^3\) इसलिए \(135=a\cdot27\) और (a=5) है। परीक्षा में चौथे पद से \(r^3\) भाग दें।