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The Domain of the Function f(x,y)=ln(2x2+y2)f ( x , y ) = \ln \left( 2 x ^ { 2 } + y ^ { 2 } \right)

Question 56

Multiple Choice

The domain of the function f(x,y) =ln(2x2+y2) f ( x , y ) = \ln \left( 2 x ^ { 2 } + y ^ { 2 } \right) is


A) {(x,y) :(x,y) (0,0) }\{ ( x , y ) : ( x , y ) \neq ( 0,0 ) \}
B) {(x,y) :xy}\{ ( x , y ) : x \neq y \}
C) {(x,y) :y2x}\{ ( x , y ) : y \neq \sqrt { 2 } x \}
D) {(x,y) :2x2+y20}\left\{ ( x , y ) : 2 x ^ { 2 } + y ^ { 2 } \leq 0 \right\}
E) {(x,y) :2x2+y20}\left\{ ( x , y ) : 2 x ^ { 2 } + y ^ { 2 } \geq 0 \right\}

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