Question

http://i1084.photobucket.com/albums/j409/QRAWarrior/MATA30-IMG-012.png

I need a hint.

Answer 1

\[\lim_{r\rightarrow9}\frac{\sqrt{r}}{(r-9)^4}=\frac{\lim_{r\rightarrow9}(\sqrt r)}{(\lim_{r\rightarrow9}(r-9))^4}\]
That should help :)

Answer 2

Hmm is it Zero?

Answer 3

I meant infinity

Answer 4

I wanna start with difference of squares in the denominator, but I'm not sure that helps much...

Answer 5

It's Infinity, Undefined
http://www.wolframalpha.com/input/?i=lim+r+tends+to+9+sqrt%28r%29%2F+%28r+-9%29^4
Yeah that doesn't help

Answer 6

Congratulations Turing, You're a Master now!

Answer 7

Yeah, still making the same mistakes though :/

Answer 8

thx