Let W(s, t) = F(u(s, t), v(s, t)), where F, u, and v are differentiable, and the following applies. u(1, −9) = 3 v(1, −9) = 0 us(1, −9) = 9 vs(1, −9) = −6 ut(1, −9) = 4 vt(1, −9) = 7 Fu(3, 0) = −2 Fv(3, 0) = −4 Find Ws(1, −9) and Wt(1, −9).

Step-by-step explanation:

               u                                       v

To find

Now we can apply the above expression

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

(1,-9)=((u(1, -9), v(1, -9)), (u(1, -9), v(1, -9))) · ((1, -9), (1, -9))

         =((3, 0), (3, 0)) · (9, -6)

To find :

(1,-9)=((u(1, -9), v(1, -9)), (u(1, -9), v(1, -9))) · ((1, -9), (1, -9))

          = ((3, 0), (3, 0)) · (4, 7)

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.