11th mathematics exercise questions with answers, Mathematics

Sequences and Series – Exercise 9.4 – Class XI

Find the sum of n terms of the series 1x2 + 2x3 + 3x4 + 4x5 +… Solution: The given series is 1x2 + 2x3 + 3x4 + 4x5 +… nth term, an=n(n+1) Find the sum to n terms of the series 1 × 2 × 3 + 2 × 3 × 4 + 3… Continue reading Sequences and Series – Exercise 9.4 – Class XI