Solve all your doubts with Teachoo Black (new monthly pack available now!)
Ex 9.1
Last updated at May 29, 2018 by Teachoo
Ex9.1,1 Write the first five terms of the sequences whose nth term is an = n(n+2) We need to find first five terms i.e. a1, a2, a3 , a4, a5 an = n(n + 2) Putting n = 1 in an a1 = 1(1 + 2) = 1 × 3 = 3 Putting n = 2 in an a2 = 2(2 + 2) = 2 × 4 = 8 Putting n = 3 in an a3 = 3(3 + 2) = 3 × 5 = 15 Putting n = 4 in an a4 = 4(4 + 2) = 4 × 6 = 24 Putting n = 5 in an a5 = 5(5 + 2) = 5 × 7 = 35 Hence first five terms are 3, 8, 15, 24, and 35.