यदि समानांतर श्रेढ़ी में (a=9) और (d=6) है, तो तीसरा पद क्या होगा?
If an arithmetic progression has (a=9) and (d=6), what will be the third term?
Explanation opens after your attempt
D. (21)
Concept
(a_3=9+2(6)=21). Up to the third term, two common differences are added.
Why this answer is correct
The correct answer is D. (21). (a_3=9+2(6)=21). Up to the third term, two common differences are added.
Exam Tip
(a_3=9+2(6)=21)। तीसरे पद तक दो समान अंतर जोड़े जाते हैं।
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