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In the AP (90,83,76,\ldots), which is the last term greater than (20)?समान्तर श्रेणी (90,83,76,\ldots) में (20) से बड़ा अंतिम पद कौन-सा है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 2727
Here, the first term is \(a=90\) and the common difference is \(d=-7\). The terms proceed as \(90,83,76,\ldots,27,20\). The next term after \(27\) is \(20\), which is not greater than \(20\). Therefore, the last term greater than \(20\) is \(27\). Exam tip: In a decreasing AP, check the two consecutive terms around the given limit.यहाँ प्रथम पद \(a=90\) और सार्वांतर \(d=-7\) है। पदों का क्रम \(90,83,76,\ldots,27,20\) होगा। \(27\) के बाद अगला पद \(20\) है, जो \(20\) से बड़ा नहीं है। इसलिए \(20\) से बड़ा अंतिम पद \(27\) है। परीक्षा टिप: घटती AP में सीमा के आसपास के लगातार दो पद जाँचें।
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