कौन सा अनुक्रम (a=15) और \(d=-\frac{5}{2}\) वाली अंकगणितीय श्रेणी है?
Which sequence is an arithmetic progression with (a=15) and \(d=-\frac{5}{2}\)?
Explanation opens after your attempt
A. \(15,\frac{25}{2},10,\frac{15}{2},\ldots\)
Concept
\(15-\frac{5}{2}=\frac{25}{2}\), and \(-\frac{5}{2}\) continues to be added. Check both (a) and (d) conditions together.
Why this answer is correct
The correct answer is A. \(15,\frac{25}{2},10,\frac{15}{2},\ldots\). \(15-\frac{5}{2}=\frac{25}{2}\), and \(-\frac{5}{2}\) continues to be added. Check both (a) and (d) conditions together.
Exam Tip
\(15-\frac{5}{2}=\frac{25}{2}\) और आगे भी \(-\frac{5}{2}\) जुड़ता है। (a) और (d) दोनों शर्तें साथ जांचें।
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