Describe the level curves of the function f(x,y) = , where a 0.
A) all circles in the xy-plane
B) all circles in the xy-plane having centres at the origin.
C) all circles in the xy-plane having centres at the origin and radii less than a
D) the origin together with all circles in the xy-plane having centres at the origin and radii in the interval (0, a]
E) a circle in the xy -plane having its centre at the origin and radius = a

Question

Describe the level curves of the function f(x,y) =  , where a > 0.
A) all circles in the xy-plane 
B) all circles in the xy-plane having centres at the origin. 
C) all circles in the xy-plane having centres at the origin and radii less than a 
D) the origin together with all circles in the xy-plane having centres at the origin and radii in the interval (0, a] 
E) a circle in the xy -plane having its centre at the origin and radius = a

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The Answer of Describe the level curves of the function f(x,y) =  , where a > 0.
A) all circles in the xy-plane 
B) all circles in the xy-plane having centres at the origin. 
C) all circles in the xy-plane having centres at the origin and radii less than a 
D) the origin together with all circles in the xy-plane having centres at the origin and radii in the interval (0, a] 
E) a circle in the xy -plane having its centre at the origin and radius = a

Describe the Level Curves of the Function F(x,y) =