1. Consider x=h(y,z) as a parametrized surface in the natural way. Write the equation of the tangent plane to the surface at the point (5,3,−4) given that ∂h/∂y(3,−4)=1 and ∂h/∂z(3,−4)=0.
2. Find the equation of the tangent plane to the surface z=0y^2−9x^2 at the point (3,−1,−81). z=?
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