यदि \(a_n=n^2-1\) है, तो \(a_9\) का मान क्या होगा?
If \(a_n=n^2-1\), what is the value of \(a_9\)?
Explanation opens after your attempt
B. (80)
Concept
\(a_9=9^2-1=80\). First square and then subtract (1).
Why this answer is correct
The correct answer is B. (80). \(a_9=9^2-1=80\). First square and then subtract (1).
Exam Tip
\(a_9=9^2-1=80\)। पहले वर्ग करें फिर (1) घटाएं।
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