Randolph College
Department of Mathematics and Computer Science

 

Homework # 9 - Math 149


The problems on this homework must be done alone.  The honor code is in effect.

 First name:   Last name:


 

For problems 1 - 4, consider the function $$f(x) = \left\{ \begin{array}{ll} x-1 \hspace{.1 in} & \mbox{if } x \leq 2 \\ x+1 & \mbox{if } x>2\end{array}\right.$$

1.   What is \(f(2)\)?

a.  0

b.  1

c.  2

d.  3

e.  Undefined

 

2.   What is \(\lim_{x \rightarrow 2^{-}} f(x)\)?

a.  0

b.  1

c.  2

d.  3

e.  Does not exist

 

3.   What is \(\lim_{x \rightarrow 2^{+}} f(x)\)?

a.  0

b.  1

c.  2

d.  3

e.  Does not exist

 

4.   What is \(\lim_{x \rightarrow 2} f(x)\)?

a.  0

b.  1

c.  2

d.  3

e.  Does not exist

 

5.   What is \(\lim_{x \rightarrow 2^{-}} \frac{x+1}{(x-2)^2}\)?

a.  \(-\infty)\)

b.  \(\infty)\)

c.  0

d.  3

e.  Does not exist

 

6.   What is \(\lim_{x \rightarrow 2^{+}} \frac{x+1}{(x-2)^2}\)?

a.  \(-\infty)\)

b.  \(\infty)\)

c.  0

d.  3

e.  Does not exist

 

7.   What is \(\lim_{x \rightarrow 2} \frac{x+1}{(x-2)^2}\)?

a.  \(-\infty)\)

b.  \(\infty)\)

c.  0

d.  3

e.  Does not exist