25) Evaluate A2 B 3
a) A+B 2+
b) C2-4A + 2B
26) N + 38 = 481
27) X-67-549
28) 4N - 948
29) 4-46

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).

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?

Me. i can't figure out this question. give an explanation too. .