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What is the (n)th term of the sequence (8,21,40,65,96,\ldots)?श्रेणी (8,21,40,65,96,\ldots) का (n)वां पद क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (3n^2+4n+1)(3n^2+4n+1)
The second differences are (6), and (3n^2+4n+1) gives all starting terms. In a quadratic sequence, test options on the first three terms.दूसरे अंतर (6) हैं और (3n^2+4n+1) सभी शुरुआती पद देता है। द्विघात श्रेणी में विकल्पों को पहले तीन पदों पर जांचें।
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