Let $f ( x , y ) = \sqrt { 4 - y ^ { 2 } }$

question 78

Essay

Let $f ( x , y ) = \sqrt { 4 - y ^ { 2 } }$ .(a) Evaluate $f ( 3,0 )$ .(b) Sketch the domain of $f$ .(c) What is the range of the function $f$ ?

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