Ex 8.1, 9 - Chapter 8 Class 11 Sequences and Series

Last updated at April 16, 2024 by

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Ex9.1 , 9 Find the 9th term in the following sequence whose nth term is an =" (−1)n−1 n3" We need to find a9 an =" (−1)n−1 n3" putting n = 9 in (1) a9 =" (−1)9−1 (9)3 " = (-1)8 "(9)3" = 1 × 93 = "(9)3" = 729 Hence the 9th term is 729

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.