- #1

PsychonautQQ

- 784

- 11

## Homework Statement

Let W = F(u(s,t),v(s,t))

(in my notation, u_s would represent du/ds

u(1,0) = -7

v(1,0) = 3

u_s(1,0)=8

v_s(1,0)=5

u_t(1,0)=-2

v_t(1,0)=-4

F_u(-7,3)=-8

F_v(-7,3)=-2

Find W_s(1,0) and W_v(1,0)

Sort of having a hard time getting started here... I believe

W_s = df/du*du/ds + df/dv*dv/ds

and likewise for W_v...

I don't know how to make the knowledge of F_u(-7,3)=-8 and F_s(-7,3)=-2 useful though.