यदि \(a_2=15\) और (d=5) है, तो \(a_1\) क्या होगा?
If \(a_2=15\) and (d=5), what is \(a_1\)?
Explanation opens after your attempt
B. (10)
Concept
\(a_2=a_1+d\), so \(a_1=15-5=10\). If the second term is given move one common difference backward.
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.
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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