गुणोत्तर श्रेणी में \(a_2=24\) और \(a_5=648\) है, तो \(a_1\) क्या है?
In a geometric progression, \(a_2=24\) and \(a_5=648\). What is \(a_1\)?
Explanation opens after your attempt
B. (8)
Concept
From \(\frac{648}{24}=27=r^3\), (r=3) and \(a_1=24\div3=8\). In exams, find (r) first and then \(a_1\).
Why this answer is correct
The correct answer is B. (8). From \(\frac{648}{24}=27=r^3\), (r=3) and \(a_1=24\div3=8\). In exams, find (r) first and then \(a_1\).
Exam Tip
\(\frac{648}{24}=27=r^3\) से (r=3) और \(a_1=24\div3=8\) है। परीक्षा में पहले (r) निकालें फिर \(a_1\)।
Login to save your score, XP, coins and progress.
