यदि \(a_2=15\) और (d=5) है, तो \(a_1\) क्या होगा?

If \(a_2=15\) and (d=5), what is \(a_1\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (10)

Step 1

Concept

\(a_2=a_1+d\), so \(a_1=15-5=10\). If the second term is given move one common difference backward.

Step 2

Why this answer is correct

The correct answer is B. (10). \(a_2=a_1+d\), so \(a_1=15-5=10\). If the second term is given move one common difference backward.

Step 3

Exam Tip

\(a_2=a_1+d\) इसलिए \(a_1=15-5=10\)। दूसरा पद दिया हो तो एक समान अंतर पीछे जाएं।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_2=15\) और (d=5) है, तो \(a_1\) क्या होगा? / If \(a_2=15\) and (d=5), what is \(a_1\)?

Correct Answer: B. (10). Explanation: \(a_2=a_1+d\) इसलिए \(a_1=15-5=10\)। दूसरा पद दिया हो तो एक समान अंतर पीछे जाएं। / \(a_2=a_1+d\), so \(a_1=15-5=10\). If the second term is given move one common difference backward.

Which concept should I revise for this Mathematics MCQ?

\(a_2=a_1+d\), so \(a_1=15-5=10\). If the second term is given move one common difference backward.

What exam hint can help solve this Mathematics question?

\(a_2=a_1+d\) इसलिए \(a_1=15-5=10\)। दूसरा पद दिया हो तो एक समान अंतर पीछे जाएं।