The partial differential equation\(\left( {\frac{{{\partial ^2}{\rm{z}}}}{{\partial {{\rm{x}}^2}}}} \right) - {\rm{\;}}5\left( {\frac{{{\partial ^2}{\rm{z}}}}{{\partial {{\rm{y}}^2}}}} \right){\rm{\;}} = {\rm{\;}}0\)

The partial differential equation\(\left( {\frac{{{\partial ^2}{\rm{z}

1.	The partial differential equation\(\left( {\frac{{{\partial ^2}{\rm{z}}}}{{\partial {{\rm{x}}^2}}}} \right) - {\rm{\;}}5\left( {\frac{{{\partial ^2}{\rm{z}}}}{{\partial {{\rm{y}}^2}}}} \right){\rm{\;}} = {\rm{\;}}0\)
A.	elliptic
B.	parabolic
C.	hyperbolic
D.	none of these
Answer» D. none of these