Find the gradient of f(x,y,z) = (x² + y² +z²) Vf|(1,2,2) = Oi+Dj+Ok (Type integers or simplified fractions.) -1/2 + In (xyz) at the point (1,2,2).

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A: As per the company's guidelines , we are supposed to answer only first question. Kindly re

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A: For   x-a to be a factor of a quadretic equation then x=a is a solution of the quadretic equation.