गुणोत्तर श्रेणी \(3,6,12,24,\ldots\) का बारहवाँ पद क्या है?
What is the twelfth term of the geometric progression \(3,6,12,24,\ldots\)?
Explanation opens after your attempt
B. (6144)
Concept
Here (a=3) and (r=2) so \(a_{12}=3\cdot2^{11}=6144\). In exams use \(a_n=ar^{n-1}\).
Why this answer is correct
The correct answer is B. (6144). Here (a=3) and (r=2) so \(a_{12}=3\cdot2^{11}=6144\). In exams use \(a_n=ar^{n-1}\).
Exam Tip
यहाँ (a=3) और (r=2) है इसलिए \(a_{12}=3\cdot2^{11}=6144\) है। परीक्षा में \(a_n=ar^{n-1}\) लगाएँ।
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