समांतर श्रेणी में \(a_2=10\) और \(a_{10}=50\) है। \(a_7\) का मान क्या होगा?
In an arithmetic progression, \(a_2=10\) and \(a_{10}=50\). What is the value of \(a_7\)?
Explanation opens after your attempt
C. (35)
Concept
\(a_{10}-a_2=8d=40\), so (d=5) and (a_7=10+5(5)=35). Find the common difference first.
Why this answer is correct
The correct answer is C. (35). \(a_{10}-a_2=8d=40\), so (d=5) and (a_7=10+5(5)=35). Find the common difference first.
Exam Tip
\(a_{10}-a_2=8d=40\), इसलिए (d=5) और (a_7=10+5(5)=35)। पहले समान अंतर निकालें।
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