यदि \(a_n=7n-23\) है, तो पहला धनात्मक पद कौन-सा है?
If \(a_n=7n-23\), which is the first positive term?
Explanation opens after your attempt
B. (4)वाँ(4)th
Concept
\(a_3=-2\) and \(a_4=5\), so the first positive term is the (4)th. Check \(a_n>0\) for positive terms.
Why this answer is correct
The correct answer is B. (4)वाँ / (4)th. \(a_3=-2\) and \(a_4=5\), so the first positive term is the (4)th. Check \(a_n>0\) for positive terms.
Exam Tip
\(a_3=-2\) और \(a_4=5\), इसलिए पहला धनात्मक पद (4)वाँ है। धनात्मक पद के लिए \(a_n>0\) जांचें।
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