Factorise the numerator and denominator.Many terms will cancel out.We get an=2(n2+n+1)/3(n2+n).Since the largest power on the numerator and denominator is the same.Ans-2/3
2 Answers
Shaswata Roy
·2013-02-25 07:35:49
Dwijaraj Paul Chowdhury
·2013-02-25 06:45:08
Is the answer 0? Dividing numerators and denominators by n3
ans--- (-1)n*0
=0
- Dwijaraj Paul Chowdhury Sorry :-\ how could i make such a mistake :-/Upvote·0· Reply ·2013-02-25 08:16:11