यदि \(a_n=2n+5\) है, तो यह किस समांतर श्रेणी के पहले तीन पद देता है?
If \(a_n=2n+5\), which first three terms of an arithmetic progression does it give?
Explanation opens after your attempt
B. (7,9,11)
Concept
Putting (n=1,2,3) gives (7,9,11). In exams, use small (n) values for the first three terms.
Why this answer is correct
The correct answer is B. (7,9,11). Putting (n=1,2,3) gives (7,9,11). In exams, use small (n) values for the first three terms.
Exam Tip
(n=1,2,3) रखने पर (7,9,11) मिलते हैं। परीक्षा में पहले तीन पदों के लिए छोटे (n) मान रखें।
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