यदि किसी समान्तर श्रेणी में \(a_7=31\) और \(a_{19}=103\) है तो \(a_{34}\) का मान क्या होगा?
If in an AP \(a_7=31\) and \(a_{19}=103\), what is the value of \(a_{34}\)?
Explanation opens after your attempt
B. (193)
Concept
\(d=\frac{103-31}{19-7}=6\), so \(a_{34}=103+15\times6=193\). First find (d), then move forward from the nearer term.
Why this answer is correct
The correct answer is B. (193). \(d=\frac{103-31}{19-7}=6\), so \(a_{34}=103+15\times6=193\). First find (d), then move forward from the nearer term.
Exam Tip
\(d=\frac{103-31}{19-7}=6\) इसलिए \(a_{34}=103+15\times6=193\)। पहले (d) निकालकर निकट पद से आगे बढ़ें।
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