For problems 1  8 evaluate the indicated limits, if they exist.

1. For  evaluate,

(a)                               (b)                               (c)  

2. For  evaluate,

(a)                               (b)                               (c)  

3. For  evaluate,

(a)                               (b)                               (c)  

4. For  evaluate,

(a)                               (b)                               (c)  

5. For  evaluate,

(a)                               (b)                               (c)  

6. For  evaluate,

(a)                               (b)                               (c)  

7. For  evaluate,

(a)                               (b)                               (c)  

8. For  evaluate,

(a)                            (b)                             (c)  

For problems 9  12 find all the vertical asymptotes of the given function.

9.  

10.  

11.  

12.