- #1
nameVoid
- 241
- 0
[tex]
1. \sum_{n=1}^{\infty}ntan\frac{1}{n}
[/tex]
dont know where to start here
[tex]
2. \frac{1*3*5*****(2n-1)}{n!}[/tex]
[tex]
\frac{2n-1}{n!}[/tex]
[tex]
\frac{2(n+1)-1}{(n+1)!}*\frac{n!}{2n-1}[/tex]
[tex]
\frac{2n+1}{(n+1)(2n-1)}[/tex]
[tex]->0[/tex]
my book is showing divergence
1. \sum_{n=1}^{\infty}ntan\frac{1}{n}
[/tex]
dont know where to start here
[tex]
2. \frac{1*3*5*****(2n-1)}{n!}[/tex]
[tex]
\frac{2n-1}{n!}[/tex]
[tex]
\frac{2(n+1)-1}{(n+1)!}*\frac{n!}{2n-1}[/tex]
[tex]
\frac{2n+1}{(n+1)(2n-1)}[/tex]
[tex]->0[/tex]
my book is showing divergence