Let $f ( x , y ) = \frac { 1 } { x ^ { 2 } - y }$

question 271

Essay

Let $f ( x , y ) = \frac { 1 } { x ^ { 2 } - y }$ .(a) Evaluate $f ( 3 , - 1 )$ .(b) Sketch the domain of $f$ .(c) What is the range of the function $f$ ?

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