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 \(a_7\)?
Explanation opens after your attempt
B. (175)
Concept
Putting (n=7), (a_7=4\(7^2\)-3(7)=175). Square first, then multiply and subtract.
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.
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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