यदि \(a_1=20\) और \(r=\frac{1}{2}\) है, तो \(a_4\) क्या होगा?
If \(a_1=20\) and \(r=\frac{1}{2}\), what is \(a_4\)?
Explanation opens after your attempt
Correct Answer
B. \(\frac{5}{2}\)
Concept
(a_4=20\left\(\frac{1}{2}\right\)3=\frac{5}{2}). With a fractional ratio each term becomes half.
Why this answer is correct
The correct answer is B. \(\frac{5}{2}\). (a_4=20\left\(\frac{1}{2}\right\)3=\frac{5}{2}). With a fractional ratio each term becomes half.
Exam Tip
(a_4=20\left\(\frac{1}{2}\right\)3=\frac{5}{2})। भिन्न अनुपात में हर बार आधा होता है।
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