Graph of a surface given by z = f(x, y) = −(x ² + y ²) + 4. The global maximum at (x, y, z) = (0, 0, 4) is indicated by a blue dot.
(echo:: @ ᯤ)
Graph of a surface given by z = f(x, y) = −(x ² + y ²) + 4. The global maximum at (x, y, z) = (0, 0, 4) is indicated by a blue dot.
(echo:: @ ᯤ)