अनुक्रम \(5,10,20,40,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(5,10,20,40,\ldots\)?
Explanation opens after your attempt
Correct Answer
A. \(a_n=5\cdot2^{n-1}\)
Concept
The first term is (5), and each term is multiplied by (2). In exams, check both the first term and ratio in a geometric sequence.
Why this answer is correct
The correct answer is A. \(a_n=5\cdot2^{n-1}\). The first term is (5), and each term is multiplied by (2). In exams, check both the first term and ratio in a geometric sequence.
Exam Tip
पहला पद (5) है और हर बार (2) से गुणा हो रहा है। परीक्षा में गुणोत्तर अनुक्रम में पहले पद और अनुपात दोनों देखें।
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