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In the sequence (21,26,31,36,\ldots), what is the value of (a+d)?अनुक्रम (21,26,31,36,\ldots) में (a+d) का मान क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 2626
In this AP, the first term is \(a=21\) and the common difference is \(d=26-21=5\). Therefore, \(a+d=21+5=26\), which is the second term of the sequence. \(31\) is the third term, \(a+2d\), so it is not correct. Exam tip: In an AP, the second term is always \(a+d\).इस समांतर श्रेणी में पहला पद \(a=21\) है और सार्वांतर \(d=26-21=5\) है। अतः \(a+d=21+5=26\), जो श्रेणी का दूसरा पद है। \(31\) तीसरा पद \(a+2d\) है, इसलिए वह सही नहीं है। परीक्षा टिप: AP में दूसरा पद हमेशा \(a+d\) होता है।
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