यदि (a=8), (r=4) और \(S_4=680\) है, तो कथन कैसा है?
If (a=8), (r=4), and \(S_4=680\), what is the statement?
Explanation opens after your attempt
A. सही क्योंकि \(S_4=680\)True because \(S_4=680\)
Concept
(S_4=\frac{8\(4^4-1\)}{4-1}=680). In exams, confirm statement-type questions with the formula.
Why this answer is correct
The correct answer is A. सही क्योंकि \(S_4=680\) / True because \(S_4=680\). (S_4=\frac{8\(4^4-1\)}{4-1}=680). In exams, confirm statement-type questions with the formula.
Exam Tip
(S_4=\frac{8\(4^4-1\)}{4-1}=680) है। परीक्षा में कथन-प्रकार प्रश्न में सूत्र से पुष्टि करें।
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