यदि (a_n=5n-(-1)^n) है तो \(a_8\) का मान क्या होगा?
If (a_n=5n-(-1)^n), what will be the value of \(a_8\)?
Explanation opens after your attempt
A. (39)
Concept
\(a_8=40-1=39\) because ((-1)8=1). Exam tip: remember the sign of even and odd powers.
Why this answer is correct
The correct answer is A. (39). \(a_8=40-1=39\) because ((-1)8=1). Exam tip: remember the sign of even and odd powers.
Exam Tip
\(a_8=40-1=39\) है क्योंकि ((-1)8=1) होता है। सम और विषम घात का संकेत याद रखें।
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