समानांतर श्रेढ़ी \(42,36,30,24,\ldots\) का (n)वाँ पद कौन-सा है?
What is the (n)th term of the arithmetic progression \(42,36,30,24,\ldots\)?
Explanation opens after your attempt
Correct Answer
A. \(a_n=48-6n\)
Concept
The first term is (42) and the difference is (-6), so (a_n=42+(n-1)(-6)=48-6n). In a decreasing progression, the common difference is negative.
Why this answer is correct
The correct answer is A. \(a_n=48-6n\). The first term is (42) and the difference is (-6), so (a_n=42+(n-1)(-6)=48-6n). In a decreasing progression, the common difference is negative.
Exam Tip
पहला पद (42) और अंतर (-6) है इसलिए (a_n=42+(n-1)(-6)=48-6n)। घटती श्रेढ़ी में समान अंतर ऋणात्मक होता है।
Login to save your score, XP, coins and progress.