यदि समानांतर श्रेढ़ी में \(a_2=9\) और \(a_8=39\) है, तो \(a_5\) क्या होगा?
If an arithmetic progression has \(a_2=9\) and \(a_8=39\), what is \(a_5\)?
Explanation opens after your attempt
C. (24)
Concept
From \(a_2\) to \(a_8\), the increase over (6) gaps is (30), so (d=5), hence (a_5=9+3(5)=24). Find the common difference first.
Why this answer is correct
The correct answer is C. (24). From \(a_2\) to \(a_8\), the increase over (6) gaps is (30), so (d=5), hence (a_5=9+3(5)=24). Find the common difference first.
Exam Tip
\(a_2\) से \(a_8\) तक (6) अंतर में वृद्धि (30) है इसलिए (d=5), अतः (a_5=9+3(5)=24)। पहले समान अंतर निकालें।
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