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Which sequence is an arithmetic progression with (a=15) and (d=-\frac{5}{2})?कौन सा अनुक्रम (a=15) और (d=-\frac{5}{2}) वाली अंकगणितीय श्रेणी है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (15,\frac{25}{2},10,\frac{15}{2},\ldots)(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.(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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