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 \(a_8\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. (39)

Step 1

Concept

\(a_8=40-1=39\) because ((-1)8=1). Exam tip: remember the sign of even and odd powers.

Step 2

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.

Step 3

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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Mathematics Answer, Explanation and Revision Hints

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 \(a_8\)?

Correct Answer: A. (39). Explanation: \(a_8=40-1=39\) है क्योंकि ((-1)8=1) होता है। सम और विषम घात का संकेत याद रखें। / \(a_8=40-1=39\) because ((-1)8=1). Exam tip: remember the sign of even and odd powers.

Which concept should I revise for this Mathematics MCQ?

\(a_8=40-1=39\) because ((-1)8=1). Exam tip: remember the sign of even and odd powers.

What exam hint can help solve this Mathematics question?

\(a_8=40-1=39\) है क्योंकि ((-1)8=1) होता है। सम और विषम घात का संकेत याद रखें।