11th mathematics exercise questions with answers, Mathematics

Sequences and Series – Exercise 9.1 – Class XI

Write the first terms of the sequences whose nth terms is an = n(n + 2) Solution: an = n(n + 2) Substituting  n = 1, 2, 3, 4 and 5 we obtain a1 = 1(1+2) = 3 a2 = 2(2+2) = 8 a3 = 3(3+2) = 15 a4 = 4(4+2) = 24 a5 =… Continue reading Sequences and Series – Exercise 9.1 – Class XI