गुणोत्तर श्रेढ़ी \(5,-20,80,-320,\ldots\) में \(a_5+a_3\) कितना है?
In the geometric progression \(5,-20,80,-320,\ldots\), what is \(a_5+a_3\)?
Explanation opens after your attempt
D. (1360)
Concept
\(a_3=80\) and \(a_5=1280\), so the sum is (1360). Keep signs in mind with a negative ratio.
Why this answer is correct
The correct answer is D. (1360). \(a_3=80\) and \(a_5=1280\), so the sum is (1360). Keep signs in mind with a negative ratio.
Exam Tip
\(a_3=80\) और \(a_5=1280\), इसलिए योग (1360) है। ऋणात्मक अनुपात में चिह्नों का ध्यान रखें।
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