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

question 138

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

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Definitions:

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