समांतर श्रेढ़ी \(5,8,11,\ldots\) के पहले (12) पदों का योग ज्ञात कीजिए।
Find the sum of the first (12) terms of the arithmetic progression \(5,8,11,\ldots\).
Explanation opens after your attempt
B. (258)
Concept
Here (a=5), (d=3), and (n=12), so \(S_{12}=258\). Taking the correct number of terms is important.
Why this answer is correct
The correct answer is B. (258). Here (a=5), (d=3), and (n=12), so \(S_{12}=258\). Taking the correct number of terms is important.
Exam Tip
यहाँ (a=5), (d=3), (n=12) है, इसलिए \(S_{12}=258\)। पदों की संख्या को सही लेना जरूरी है।
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