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Ex 5.1, 7 Without adding, find the sum. (i) 1 + 3 + 5 + 7 + 9 Total consecutive odd numbers = 5 Thus, n = 5 ∴ Sum = "n" ^2 = 52 = 25 Sum of first n odd numbers = "n" ^2

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Davneet Singh

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.