問題詳情
26. Find the directional derivative of F(x,y,z)=xy+2xz-y2+z2 at the point (1, －2, 1) along the curve x =t,y =t−3,z=t2 in the direction of increasing z.
(A)
(B)
(C) 11
(D) 13
(E)
26. Find the directional derivative of F(x,y,z)=xy+2xz-y2+z2 at the point (1, －2, 1) along the curve x =t,y =t−3,z=t2 in the direction of increasing z.
(A)