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If (t,t+9,t+18,\ldots) is an arithmetic progression, what is the difference between the second and first terms?यदि (t,t+9,t+18,\ldots) अंकगणितीय श्रेणी है तो दूसरे और पहले पद का अंतर क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(9\)\(9\)
The first term is \(t\) and the second term is \(t+9\). Therefore, their difference is \((t+9)-t=9\). Hence, \(9\) is the correct answer. \(t+9\) is the second term, not the difference. Exam tip: In an AP, find the common difference using \(d=a_2-a_1\).पहला पद \(t\) और दूसरा पद \(t+9\) है। अतः दूसरे और पहले पद का अंतर \((t+9)-t=9\) होगा। इसलिए सही उत्तर \(9\) है। \(t+9\) दूसरा पद है, अंतर नहीं। परीक्षा टिप: AP में सार्वांतर \(d=a_2-a_1\) से निकालें।
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