PLEASE HELP ME WITH THIS!! i need to know what did dominque do wrong in substiting her values into her formula

i also need to know the actual percent of change

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).

What is the average diastolic blood pressure for adults

How can you find the mean absolute deviation (mad) for this set of data?