समांतर श्रेणी में \(a_5=30\) और (d=7) है। \(a_1\) क्या होगा?

In an arithmetic progression, \(a_5=30\) and (d=7). What is \(a_1\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (2)

Step 1

Concept

\(a_5=a_1+4d\), so \(30=a_1+28\) and \(a_1=2\). To move backward from a given term subtract common differences.

Step 2

Why this answer is correct

The correct answer is A. (2). \(a_5=a_1+4d\), so \(30=a_1+28\) and \(a_1=2\). To move backward from a given term subtract common differences.

Step 3

Exam Tip

\(a_5=a_1+4d\), इसलिए \(30=a_1+28\) और \(a_1=2\)। दिए पद से पीछे जाने के लिए समान अंतर घटाएं।

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Mathematics Answer, Explanation and Revision Hints

समांतर श्रेणी में \(a_5=30\) और (d=7) है। \(a_1\) क्या होगा? / In an arithmetic progression, \(a_5=30\) and (d=7). What is \(a_1\)?

Correct Answer: A. (2). Explanation: \(a_5=a_1+4d\), इसलिए \(30=a_1+28\) और \(a_1=2\)। दिए पद से पीछे जाने के लिए समान अंतर घटाएं। / \(a_5=a_1+4d\), so \(30=a_1+28\) and \(a_1=2\). To move backward from a given term subtract common differences.

Which concept should I revise for this Mathematics MCQ?

\(a_5=a_1+4d\), so \(30=a_1+28\) and \(a_1=2\). To move backward from a given term subtract common differences.

What exam hint can help solve this Mathematics question?

\(a_5=a_1+4d\), इसलिए \(30=a_1+28\) और \(a_1=2\)। दिए पद से पीछे जाने के लिए समान अंतर घटाएं।