Which equation below describes a parabola with a directrix equals three and focus at -3, -3 A. (y+3)^2=12x
B. X^2=-12(y+3)
C. (X-3)^2=-12(y+3)
D. (Y+3)^2= -12x

Find the gradient of f(x, y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Can any one me with the answers to these questions asap?

Need on this geometry question. explain how you did it.