अनुक्रम \(74,68,62,56,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(74,68,62,56,\ldots\)?
Explanation opens after your attempt
B. \(a_n=80-6n\)
Concept
At (n=1) it gives (74) and at (n=2) it gives (68) so \(a_n=80-6n\). In exams check the first two terms of a decreasing sequence.
Why this answer is correct
The correct answer is B. \(a_n=80-6n\). At (n=1) it gives (74) and at (n=2) it gives (68) so \(a_n=80-6n\). In exams check the first two terms of a decreasing sequence.
Exam Tip
(n=1) पर (74) और (n=2) पर (68) मिलता है इसलिए \(a_n=80-6n\) है। परीक्षा में घटते अनुक्रम के पहले दो पद जाँचें।
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