यदि \(a_n=3n^3-n\) है तो \(a_3\) का मान क्या होगा?

If \(a_n=3n^3-n\) then what is the value of \(a_3\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (78)

Step 1

Concept

\(a_3=3\times27-3=78\). In exams subtract the current (n) after cubing.

Step 2

Why this answer is correct

The correct answer is B. (78). \(a_3=3\times27-3=78\). In exams subtract the current (n) after cubing.

Step 3

Exam Tip

\(a_3=3\times27-3=78\) है। परीक्षा में घन के बाद वर्तमान (n) घटाएँ।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=3n^3-n\) है तो \(a_3\) का मान क्या होगा? / If \(a_n=3n^3-n\) then what is the value of \(a_3\)?

Correct Answer: B. (78). Explanation: \(a_3=3\times27-3=78\) है। परीक्षा में घन के बाद वर्तमान (n) घटाएँ। / \(a_3=3\times27-3=78\). In exams subtract the current (n) after cubing.

Which concept should I revise for this Mathematics MCQ?

\(a_3=3\times27-3=78\). In exams subtract the current (n) after cubing.

What exam hint can help solve this Mathematics question?

\(a_3=3\times27-3=78\) है। परीक्षा में घन के बाद वर्तमान (n) घटाएँ।