There are two asymptotes. I found x=0. But i'm stuck as I don't know how to get y=x+1 as an asymptote.

I first solved f'(x) and made that equal zero which I got x=+/- 3. But because x>0, so x=3 ---> (3, 7)

and I computed f''(x), plugged 3 in, the answer >0 so concave up and (3,7) is the minimum value.

I know there is an asymptote at x=0, but what about the other one?

Thanks!