यदि \(a_1=5\) और \(a_4=625\) है, तथा (r) धनात्मक है, तो \(a_5\) क्या होगा?
If \(a_1=5\) and \(a_4=625\), and (r) is positive, what will \(a_5\) be?
Explanation opens after your attempt
D. (3125)
Concept
\(625=5r^3\), so \(r^3=125\) and (r=5), hence \(a_5=3125\). First find the ratio and then form the next term.
Why this answer is correct
The correct answer is D. (3125). \(625=5r^3\), so \(r^3=125\) and (r=5), hence \(a_5=3125\). First find the ratio and then form the next term.
Exam Tip
\(625=5r^3\), इसलिए \(r^3=125\) और (r=5), अतः \(a_5=3125\)। पहले अनुपात निकालें फिर अगला पद बनाएं।
Login to save your score, XP, coins and progress.
