Math test assesment chapter 5 answer #9

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).

The step function g(x) is defined as shown. what is the range of g(x)? ***answer choices in picture.

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation