यदि \(a_4=13\) और \(a_{13}=67\) है, तो \(a_1\) क्या होगा?

If \(a_4=13\) and \(a_{13}=67\), what is \(a_1\)?

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

A. (-5)

Step 1

Concept

\(a_{13}-a_4=9d=54\), so (d=6) and (a_1=13-3(6)=-5). Find the common difference first.

Step 2

Why this answer is correct

The correct answer is A. (-5). \(a_{13}-a_4=9d=54\), so (d=6) and (a_1=13-3(6)=-5). Find the common difference first.

Step 3

Exam Tip

\(a_{13}-a_4=9d=54\), इसलिए (d=6) और (a_1=13-3(6)=-5)। पहले समान अंतर निकालें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_4=13\) और \(a_{13}=67\) है, तो \(a_1\) क्या होगा? / If \(a_4=13\) and \(a_{13}=67\), what is \(a_1\)?

Correct Answer: A. (-5). Explanation: \(a_{13}-a_4=9d=54\), इसलिए (d=6) और (a_1=13-3(6)=-5)। पहले समान अंतर निकालें। / \(a_{13}-a_4=9d=54\), so (d=6) and (a_1=13-3(6)=-5). Find the common difference first.

Which concept should I revise for this Mathematics MCQ?

\(a_{13}-a_4=9d=54\), so (d=6) and (a_1=13-3(6)=-5). Find the common difference first.

What exam hint can help solve this Mathematics question?

\(a_{13}-a_4=9d=54\), इसलिए (d=6) और (a_1=13-3(6)=-5)। पहले समान अंतर निकालें।