Solving Limit Probs: x Approaching 0

[celeste6]

hey could anyone help me with some limit probs?
the lim as x approaches 9
(x^2 - 81)/(\sqrt{}x - 3)

lim as x approaches 0
(2x+sinx)/x

lim as x approaches o from the right side
(sinx)/(5\sqrt{}x)

lim as x approaches 0
(tan7x)/(sin3x)

thanks!

 

[genneth]

You have to show some attempted workings -- not only because doing is the best way to learn, but because then we know where to begin to help. So in this case, are you familiar with l'Hopital's rule?

 

[celeste6]

ok i'll guess
108
3
?
7/3

 

[HallsofIvy]

Don't guess! Show us your calculation- it's not that much to want!