अनुक्रम \(2,8,26,80,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(2,8,26,80,\ldots\)?
Explanation opens after your attempt
A. \(a_n=3^n-1\)
Concept
\(3^n-1\) gives (2,8,26,80). In exams check a power rule in rapidly growing terms.
Why this answer is correct
The correct answer is A. \(a_n=3^n-1\). \(3^n-1\) gives (2,8,26,80). In exams check a power rule in rapidly growing terms.
Exam Tip
\(3^n-1\) से (2,8,26,80) मिलते हैं। परीक्षा में तेज बढ़ते पदों में घात वाला नियम जाँचें।
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