BraedynM9338 BraedynM9338 09-01-2023 Mathematics contestada For the functions below, what is the direction of fastest increase at (1, 1, 1)? (a) f(x, y, z) = 1/x² + y² + 22 (b) f(x, y, z) = 4xy + 4yz + 4xz 6 (c) f(x, y, z) x2 + y2 + z2