यदि \(a_n=39-5n\) है, तो पहला ऋणात्मक पद कौन-सा है?
If \(a_n=39-5n\), which is the first negative term?
Explanation opens after your attempt
C. (8)वाँ(8)th
Concept
\(a_7=4\) and \(a_8=-1\), so the first negative term is the (8)th. Look for the first term below zero.
Why this answer is correct
The correct answer is C. (8)वाँ / (8)th. \(a_7=4\) and \(a_8=-1\), so the first negative term is the (8)th. Look for the first term below zero.
Exam Tip
\(a_7=4\) और \(a_8=-1\), इसलिए पहला ऋणात्मक पद (8)वाँ है। शून्य से नीचे जाने वाला पहला पद देखें।
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