Still a Messy Close Form?

Algebra Level 4

\[ \large \sum_{n=1}^{2015} \left [ (-1)^n \left ( \frac { n^2+n+1}{n!} \right ) \right ] \]

If the summation equals to \( -a - \frac {b}{c!} \) for positive integers \(a,b,c\)

What is the minimum value of \(a+b+c\)?

×

Problem Loading...

Note Loading...

Set Loading...