यदि \(a_1=6\) और \(a_4=750\) है तथा (r) धनात्मक है, तो \(a_5\) क्या होगा?
If \(a_1=6\) and \(a_4=750\), and (r) is positive, what is \(a_5\)?
Explanation opens after your attempt
C. (3750)
Concept
From \(750=6r^3\), \(r^3=125\) and (r=5), so \(a_5=750\cdot5=3750\). In exams, find the ratio first.
Why this answer is correct
The correct answer is C. (3750). From \(750=6r^3\), \(r^3=125\) and (r=5), so \(a_5=750\cdot5=3750\). In exams, find the ratio first.
Exam Tip
\(750=6r^3\) से \(r^3=125\) और (r=5), इसलिए \(a_5=750\cdot5=3750\) है। परीक्षा में पहले अनुपात निकालें।
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