यदि \(a_n=6n^2-5\) है, तो \(a_4\) क्या होगा?
If \(a_n=6n^2-5\), what is \(a_4\)?
Explanation opens after your attempt
B. (91)
Concept
(a_4=6(4)2-5=91). First square, then multiply and subtract.
Why this answer is correct
The correct answer is B. (91). (a_4=6(4)2-5=91). First square, then multiply and subtract.
Exam Tip
(a_4=6(4)2-5=91)। पहले वर्ग करें फिर गुणा और घटाव करें।
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