अनुक्रम \(2,7,24,77,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?

Which explicit rule is correct for the sequence \(2,7,24,77,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

D. \(a_n=3^n-n\)

Step 1

Concept

\(3^n-n\) gives (2,7,24,77). In exams, also test options where the term number is subtracted from a power.

Step 2

Why this answer is correct

The correct answer is D. \(a_n=3^n-n\). \(3^n-n\) gives (2,7,24,77). In exams, also test options where the term number is subtracted from a power.

Step 3

Exam Tip

\(3^n-n\) से (2,7,24,77) मिलते हैं। परीक्षा में घात में से पद संख्या घटाकर भी विकल्प जाँचें।

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Mathematics Answer, Explanation and Revision Hints

अनुक्रम \(2,7,24,77,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है? / Which explicit rule is correct for the sequence \(2,7,24,77,\ldots\)?

Correct Answer: D. \(a_n=3^n-n\). Explanation: \(3^n-n\) से (2,7,24,77) मिलते हैं। परीक्षा में घात में से पद संख्या घटाकर भी विकल्प जाँचें। / \(3^n-n\) gives (2,7,24,77). In exams, also test options where the term number is subtracted from a power.

Which concept should I revise for this Mathematics MCQ?

\(3^n-n\) gives (2,7,24,77). In exams, also test options where the term number is subtracted from a power.

What exam hint can help solve this Mathematics question?

\(3^n-n\) से (2,7,24,77) मिलते हैं। परीक्षा में घात में से पद संख्या घटाकर भी विकल्प जाँचें।