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Find the tangent plane to the surface xz+2x2y +y2z3=11 at the point (2,1,1)
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- find the equation of the tangent plane and normal line to the surface x^2+y^2-2xy-x+3y-z^2 at point (1,-1,2)Find the slope of the tangent line at the point (1,−2,−3) on the curve of intersection of the surface z = 5−4x² −y² with (a) the plane x = 1 (b) the plane y = −2.Find the equation of the tangent plane to the surface2x^2 -xz + y^2 -zy = -5 at the point (1, 3, 4)