What are the answer to these questions? DO NOT DELETE NOR GIVE ME ANSWER LINK

IF YOU DONT KNOW THE ANSWER THEN BACK AWAY FROM THIS QUESTION AND LEAVE IT ALONE

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 length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?

Idon’t know what to do after i plot my first shape