समानांतर श्रेढ़ी \(45,39,33,27,\ldots\) का पहला ऋणात्मक पद कौन-सा है?
What is the first negative term of the arithmetic progression \(45,39,33,27,\ldots\)?
Explanation opens after your attempt
B. (9)वाँ(9)th
Concept
\(a_8=3\) and \(a_9=-3\), so the first negative term is the (9)th. Check the first term that goes below zero.
Why this answer is correct
The correct answer is B. (9)वाँ / (9)th. \(a_8=3\) and \(a_9=-3\), so the first negative term is the (9)th. Check the first term that goes below zero.
Exam Tip
\(a_8=3\) और \(a_9=-3\), इसलिए पहला ऋणात्मक पद (9)वाँ है। शून्य से नीचे जाने वाला पहला पद जांचें।
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