समांतर श्रेणी \(50,43,36,29,\ldots\) में (1) कौन-सा पद है?
In the arithmetic progression \(50,43,36,29,\ldots\), which term is (1)?
Explanation opens after your attempt
B. (8)वाँ(8)th
Concept
From (50+(n-1)(-7)=1), (7(n-1)=49) and (n=8). The same \(a_n\) formula works in a decreasing progression.
Why this answer is correct
The correct answer is B. (8)वाँ / (8)th. From (50+(n-1)(-7)=1), (7(n-1)=49) and (n=8). The same \(a_n\) formula works in a decreasing progression.
Exam Tip
(50+(n-1)(-7)=1) से (7(n-1)=49) और (n=8)। घटती श्रेणी में भी वही \(a_n\) सूत्र लगता है।
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