समानांतर श्रेढ़ी \(22,18,14,10,\ldots\) का (n)वाँ पद कौन-सा है?
What is the (n)th term of the arithmetic progression \(22,18,14,10,\ldots\)?
Explanation opens after your attempt
A. \(a_n=26-4n\)
Concept
The first term is (22) and (d=-4), so (a_n=22+(n-1)(-4)=26-4n). Keep (d) negative in a decreasing sequence.
Why this answer is correct
The correct answer is A. \(a_n=26-4n\). The first term is (22) and (d=-4), so (a_n=22+(n-1)(-4)=26-4n). Keep (d) negative in a decreasing sequence.
Exam Tip
पहला पद (22) और (d=-4) है इसलिए (a_n=22+(n-1)(-4)=26-4n)। घटते क्रम में (d) को ऋणात्मक रखें।
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