- #1

- 164

- 0

## Homework Statement

In one of my problems, i'm asked to use integral test in order to determine whether the following function is converging or diverging:

(summation from n=1 to inf) 1/(n^2-4n-5)

I was just wondering how do we know if function is positive, continuous and decreasing because when i tried to see if it was positive (i plugged in a value), i got a negative...

Also, for a integral test, does the entire function have to be decreasing?