यदि किसी गुणोत्तर श्रेढ़ी में \(a_1=7\) और \(a_4+a_5=756\) है, तथा (r=3) है, तो कौन-सा कथन सही है?
If in a geometric progression \(a_1=7\), \(a_4+a_5=756\), and (r=3), which statement is correct?
Explanation opens after your attempt
C. सही योग (756) नहीं बल्कि (945) हैThe correct sum is (945), not (756)
Concept
\(a_4=7\cdot3^3=189\) and \(a_5=567\), so the sum is (756). Therefore the given sum is correct.
Why this answer is correct
The correct answer is C. सही योग (756) नहीं बल्कि (945) है / The correct sum is (945), not (756). \(a_4=7\cdot3^3=189\) and \(a_5=567\), so the sum is (756). Therefore the given sum is correct.
Exam Tip
\(a_4=7\cdot3^3=189\) और \(a_5=567\), इसलिए योग (756) है। इसलिए दिया योग सही है।
Login to save your score, XP, coins and progress.
