Use the definition of derivative: $\lim _ { z \rightarrow c } \frac { f ( z ) - f ( c ) } { z - c }$ to find $f ^ { \prime } ( - 2 ) \text {, if } f ( x ) = \frac { 2 } { x }$

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The Answer of Use the definition of derivative: $\lim _ { z \rightarrow c } \frac { f ( z ) - f ( c ) } { z - c }$ to find $f ^ { \prime } ( - 2 ) \text {, if } f ( x ) = \frac { 2 } { x }$

Use the Definition of Derivative lim⁡z→cf(z)−f(c)z−c\lim _ { z \rightarrow c } \frac { f ( z ) - f ( c ) } { z - c }limz→c​z−cf(z)−f(c)​

Use the Definition of Derivative $\lim _ { z \rightarrow c } \frac { f ( z ) - f ( c ) } { z - c }$