Given the surfacezfxyx3x25xy3y2 a enter the coordinates of


Given the surfacez=f(x,y)=x^3+x^2+5xy+3y^2,

a) Enter the coordinates of the point on the surface where x=1and y=2 ?

b) Hence enter the equation of the plane that is tangent to z=f(x,y)at that point. For example, if your equation of the plane is 2x+y+z-5=0,enter 2*x+y+z-5 ?

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Mathematics: Given the surfacezfxyx3x25xy3y2 a enter the coordinates of
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