Limit help

[edus1898]

I tried to use the limit of the exponential for the second one but it got me nowhere because is (x-1)*e^x-2 -1 and so I can't use the rule.
For thw first one I tried to use the limit of the function sin but I'm stuck because I have x^2-x-2 at the denominator

 

[Dr.Peterson]

Have you learned L'Hospital's rule yet?

If not, please state the two rules you mention so we can be sure what you have in mind, and tell us what other techniques you have learned.