गुणोत्तर श्रेणी \(7,14,28,56,\ldots\) का बारहवाँ पद क्या है?
What is the twelfth term of the geometric progression \(7,14,28,56,\ldots\)?
Explanation opens after your attempt
B. (14336)
Concept
Here (a=7) and (r=2), so \(a_{12}=7\cdot2^{11}=14336\). In exams, use \(a_n=ar^{n-1}\).
Why this answer is correct
The correct answer is B. (14336). Here (a=7) and (r=2), so \(a_{12}=7\cdot2^{11}=14336\). In exams, use \(a_n=ar^{n-1}\).
Exam Tip
यहाँ (a=7) और (r=2) है इसलिए \(a_{12}=7\cdot2^{11}=14336\) है। परीक्षा में \(a_n=ar^{n-1}\) लगाएँ।
Login to save your score, XP, coins and progress.
