यदि \(a_n=3^n-1\) है तो \(a_4\) का मान क्या होगा?

If \(a_n=3^n-1\) then what is the value of \(a_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (80)

Step 1

Concept

\(a_4=3^4-1=80\). In exams find the power and subtract (1).

Step 2

Why this answer is correct

The correct answer is B. (80). \(a_4=3^4-1=80\). In exams find the power and subtract (1).

Step 3

Exam Tip

\(a_4=3^4-1=80\) है। परीक्षा में घात निकालकर (1) घटाएँ।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=3^n-1\) है तो \(a_4\) का मान क्या होगा? / If \(a_n=3^n-1\) then what is the value of \(a_4\)?

Correct Answer: B. (80). Explanation: \(a_4=3^4-1=80\) है। परीक्षा में घात निकालकर (1) घटाएँ। / \(a_4=3^4-1=80\). In exams find the power and subtract (1).

Which concept should I revise for this Mathematics MCQ?

\(a_4=3^4-1=80\). In exams find the power and subtract (1).

What exam hint can help solve this Mathematics question?

\(a_4=3^4-1=80\) है। परीक्षा में घात निकालकर (1) घटाएँ।