Problem 1. The directional derivative of f(x, y, z) at (a, b, c) in direction u -jus k is given by n direction u-t11 Ä° + taj + tsk is given Duf(a, b,c)i(a. b, c)ui ,la, b,c) u .(a, b, e)us (a, b, c) u3 . A. Show that the second directional derivative Da f(a, b,c) is given by a, b, c)u2i3
Show transcribed image textProblem 1. The directional derivative of f(x, y, z) at (a, b, c) in direction u -jus k is given by n direction u-t11 Ä° + taj + tsk is given Duf(a, b,c)i(a. b, c)ui ,la, b,c) u .(a, b, e)us (a, b, c) u3 . A. Show that the second directional derivative Da f(a, b,c) is given by a, b, c)u2i3