यदि \(a_n=4n^2-3n\) है, तो \(a_7\) का मान क्या होगा?

If \(a_n=4n^2-3n\), what will be the value of \(a_7\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (175)

Step 1

Concept

Putting (n=7), (a_7=4\(7^2\)-3(7)=175). Square first, then multiply and subtract.

Step 2

Why this answer is correct

The correct answer is B. (175). Putting (n=7), (a_7=4\(7^2\)-3(7)=175). Square first, then multiply and subtract.

Step 3

Exam Tip

(n=7) रखने पर (a_7=4\(7^2\)-3(7)=175) है। पहले वर्ग निकालें फिर गुणा और घटाव करें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=4n^2-3n\) है, तो \(a_7\) का मान क्या होगा? / If \(a_n=4n^2-3n\), what will be the value of \(a_7\)?

Correct Answer: B. (175). Explanation: (n=7) रखने पर (a_7=4\(7^2\)-3(7)=175) है। पहले वर्ग निकालें फिर गुणा और घटाव करें। / Putting (n=7), (a_7=4\(7^2\)-3(7)=175). Square first, then multiply and subtract.

Which concept should I revise for this Mathematics MCQ?

Putting (n=7), (a_7=4\(7^2\)-3(7)=175). Square first, then multiply and subtract.

What exam hint can help solve this Mathematics question?

(n=7) रखने पर (a_7=4\(7^2\)-3(7)=175) है। पहले वर्ग निकालें फिर गुणा और घटाव करें।