I have two questions .. let's suppose we want to solve a limit by using L'Hopital's Rule , and we can't solve it because there's still infinity ... can we use more than once derivatives.... Example:
http://i1064.photobucket.com/albums/u368/Kreshnik-joker/Limit.jpg
(I didn't try if this limit works or not...)
2. question nr 2. is about vectors, since I'm dumb about these kind of problems, I could use a little help here :) .
http://i1064.photobucket.com/albums/u368/Kreshnik-joker/Vectors.jpg
Thank you.

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