Which choice shows the correct solution to 2247 divided by 7

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).

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Which of the following circles have their centers in the third quadrant?