To answer this problem, first write down the type of each sequence. then compare your list to the choices offered below.

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).

How do you solve a question like this?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.