Gradient fields Find the gradient field F = ▿ϕ for the potential function ϕ. Sketch a few level curves of ϕ and a few vectors of F . 25. φ ( x , y ) = x 2 + y 2 , for x 2 + y 2 ≤ 16
Gradient fields Find the gradient field F = ▿ϕ for the potential function ϕ. Sketch a few level curves of ϕ and a few vectors of F . 25. φ ( x , y ) = x 2 + y 2 , for x 2 + y 2 ≤ 16
CLO 5
Find the gradient of the scalar function V=p2 cos²o
at P(2,3.62,3).
а. 1.63 ар -3.15 аф
b. 1.58 ap - 0.82 ad
с. 3.15 ар- 1.63 аф
d. -3.55 ap 0.82 ad
e. None of the choices
WHite the veD secsand orde equation as is equivalent svstem of hirst order equations.
u" +7.5z - 3.5u = -4 sin(3t),
u(1) = -8,
u'(1)
-6.5
Use v to represent the "velocity fumerion", ie.v =().
Use o and u for the rwo functions, rather than u(t) and v(t). (The latter confuses webwork. Functions like sin(t) are ok.)
+7.5v+3.5u-4 sin 3t
Now write the system using matrices:
dt
3.5
7.5
4 sin(3t)
and the initial value for the vector valued function is:
u(1)
v(1)
3.5
- 40 Let u(t) = 8t i+ (-9)j-8k and v(t)= e'i+9ej- e "k. Compute the derivative of the following function.
u(t) - v(t)
z5 (1
Select the correct choice below and fill in the answer box(es) to complete your choice.
z6(
O A. The derivative is the scalar function
actice
Di+k.
O B. The derivative is the vector-valued function
i+
st 2 (
uiz 7 (1
uiz 8 (1
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uiz 9 (1
Practice Test3
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