$$\text { Find the limit } \lim _ { x \rightarrow 0 } \frac { \sqrt { x + 6 } - \sqrt { 6 } } { x } \text {, if it exists. }$$

Short Answer

$$\text { Find the limit } \lim _ { x \rightarrow 0 } \frac { \sqrt { x + 6 } - \sqrt { 6 } } { x } \text {, if it exists. }$$