अनुक्रम \(5,10,20,40,\ldots\) में कौन सा पद (5120) है?
In the sequence \(5,10,20,40,\ldots\), which term is (5120)?
Explanation opens after your attempt
B. (11)वाँ(11)th
Concept
\(5\times2^{10}=5120\), so it is the (11)th term. Exam tip: from the first term, the exponent is (n-1).
Why this answer is correct
The correct answer is B. (11)वाँ / (11)th. \(5\times2^{10}=5120\), so it is the (11)th term. Exam tip: from the first term, the exponent is (n-1).
Exam Tip
\(5\times2^{10}=5120\) है इसलिए यह (11)वाँ पद है। पहले पद से गिनते समय घात (n-1) होती है।
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