Question: Find the gradient vector of F(x, y, z) = 9x2 + 4y2 + 9z2 - 34 at the point P(1, 2, -1). Write the equation

Find the gradient vector of F(x, y, z) = 9x2 + 4y2 + 9z2 - 34 at the point P(1, 2, -1). Write the equation of the tangent plane to the surface F(x, y, z) = 0 at P.

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