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Which is the third term in the arithmetic progression (3,9,15,21,\ldots)?समांतर श्रेढ़ी (3,9,15,21,\ldots) में तीसरा पद कौन-सा है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 1515
The terms of the given arithmetic progression are 3, 9, 15, and 21 in order. Thus, 3 is the first term, 9 is the second term, and 15 is the third term. Since 21 is the fourth term, it is not correct. Exam tip: always count the first listed term as the first term.दी गई समांतर श्रेढ़ी के पद क्रमशः 3, 9, 15, 21 हैं। इसलिए पहला पद 3, दूसरा पद 9 और तीसरा पद 15 है। 21 चौथा पद है, इसलिए वह सही नहीं है। परीक्षा में पदों की स्थिति गिनते समय दिए गए पहले पद को हमेशा पहला ही गिनें।
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