Use a CAS to Plot the Function near the Point $$\lim _ { x \rightarrow 0 } \frac { \sqrt { 81 + x } - \sqrt { 81 - x } } { x }$$

Multiple Choice

Use a CAS to plot the function near the point x0 being approached. From your plot guess the value of the limit.
- $$\lim _ { x \rightarrow 0 } \frac { \sqrt { 81 + x } - \sqrt { 81 - x } } { x }$$

A) $\frac { 1 } { 9 }$
B) 9
C) $\frac { 1 } { 18 }$
D) 0