गुणोत्तर श्रेढ़ी \(9,-27,81,-243,\ldots\) में \(a_6+a_4\) कितना है?
In the geometric progression \(9,-27,81,-243,\ldots\), what is \(a_6+a_4\)?
Explanation opens after your attempt
A. (-1944)
Concept
\(a_4=-243\) and \(a_6=-2187\), so the sum is (-2430). The correct option should include (-2430).
Why this answer is correct
The correct answer is A. (-1944). \(a_4=-243\) and \(a_6=-2187\), so the sum is (-2430). The correct option should include (-2430).
Exam Tip
\(a_4=-243\) और \(a_6=-2187\), इसलिए योग (-2430) नहीं बल्कि (-2430) है। सही विकल्पों में (-2430) होना चाहिए।
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