Tangent Plane to a Level - MIT OpenCourseWare

Therefore the normal to surface is Vw = U2x, 4y, 6z). At the point P we have Vw| P = U2, 8, 18). Using point normal form, the equation of the tangent plane is 2(x − 1) + 8(y − 2) + 18(z − 3) = 0, or equivalently 2x + 8y + 18z = 72. 2. Use gradients and level surfaces to find the normal to the tangent plane of the graph of ................
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