समांतर श्रेणी में \(a_3=16\) और \(a_{11}=72\) है। \(a_7\) का मान क्या होगा?
In an arithmetic progression, \(a_3=16\) and \(a_{11}=72\). What is the value of \(a_7\)?
Explanation opens after your attempt
C. (44)
Concept
\(a_{11}-a_3=8d=56\), so (d=7) and (a_7=16+4(7)=44). Find the common difference first.
Why this answer is correct
The correct answer is C. (44). \(a_{11}-a_3=8d=56\), so (d=7) and (a_7=16+4(7)=44). Find the common difference first.
Exam Tip
\(a_{11}-a_3=8d=56\), इसलिए (d=7) और (a_7=16+4(7)=44)। पहले समान अंतर निकालें।
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