यदि (a_n=n(n+1)) है, तो \(a_7\) का मान क्या होगा?
If (a_n=n(n+1)), what is the value of \(a_7\)?
Explanation opens after your attempt
A. (56)
Concept
\(a_7=7\times8=56\). In exams, keep both (n) and (n+1) correct.
Why this answer is correct
The correct answer is A. (56). \(a_7=7\times8=56\). In exams, keep both (n) and (n+1) correct.
Exam Tip
\(a_7=7\times8=56\) है। परीक्षा में (n) और (n+1) दोनों को सही रखें।
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