गुणोत्तर श्रेणी \(7,21,63,\ldots\) का वह पद कौन-सा है जो (5103) है?
Which term of the geometric progression \(7,21,63,\ldots\) is (5103)?
Explanation opens after your attempt
Correct Answer
C. सातवाँ पद(7)th term
Concept
From \(7\cdot3^{n-1}=5103\), \(3^{n-1}=729=3^6\), so (n=7). In exams, compare powers to find the term number.
Why this answer is correct
The correct answer is C. सातवाँ पद / (7)th term. From \(7\cdot3^{n-1}=5103\), \(3^{n-1}=729=3^6\), so (n=7). In exams, compare powers to find the term number.
Exam Tip
\(7\cdot3^{n-1}=5103\) से \(3^{n-1}=729=3^6\), इसलिए (n=7) है। परीक्षा में पद संख्या के लिए घात की तुलना करें।
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