Looking ahead—tangent planes Consider the following surfaces f ( x, y, z ) = 0, which may be regarded as a level surface of the function w = f ( x, y z ) . A point P ( a. b, c ) on the surface is also given. a. Find the ( three-dimensional) gradient off and evaluate it at P b. The set of all vectors orthogonal to the gradient with their tails at P form a plane. Find an equation of that plane ( soon to be called the tangent plane ) . 71. f ( x , y , z ) = x 2 + y 2 + z 2 − 3 = 0 ; P ( 1 , 1 , 1 )
Looking ahead—tangent planes Consider the following surfaces f ( x, y, z ) = 0, which may be regarded as a level surface of the function w = f ( x, y z ) . A point P ( a. b, c ) on the surface is also given. a. Find the ( three-dimensional) gradient off and evaluate it at P b. The set of all vectors orthogonal to the gradient with their tails at P form a plane. Find an equation of that plane ( soon to be called the tangent plane ) . 71. f ( x , y , z ) = x 2 + y 2 + z 2 − 3 = 0 ; P ( 1 , 1 , 1 )
Looking ahead—tangent planesConsider the following surfaces f(x, y, z) = 0, which may be regarded as a level surface of the function w = f(x, y z). A point P(a. b, c) on the surface is also given.
a.Find the (three-dimensional) gradient off and evaluate it at P
b.The set of all vectors orthogonal to the gradient with their tails at P form a plane. Find an equation of that plane (soon to be called the tangent plane).
71.
f
(
x
,
y
,
z
)
=
x
2
+
y
2
+
z
2
−
3
=
0
;
P
(
1
,
1
,
1
)
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
3.1 Limits
1. If lim f(x)=-6 and lim f(x)=5, then lim f(x). Explain your choice.
x+3°
x+3*
x+3
(a) Is 5
(c) Does not exist
(b) is 6
(d) is infinite
1 pts
Let F and G be vector fields such that ▼ × F(0, 0, 0) = (0.76, -9.78, 3.29), G(0, 0, 0) = (−3.99, 6.15, 2.94), and
G is irrotational. Then sin(5V (F × G)) at (0, 0, 0) is
Question 1
-0.246
0.072
-0.934
0.478
-0.914
-0.855
0.710
0.262
.
2. Answer the following questions.
(A) [50%] Given the vector field F(x, y, z) = (x²y, e", yz²), verify the differential identity
Vx (VF) V(V •F) - V²F
(B) [50%] Remark. You are confined to use the differential identities.
Let u and v be scalar fields, and F be a vector field given by
F = (Vu) x (Vv)
(i) Show that F is solenoidal (or incompressible).
(ii) Show that
G =
(uvv – vVu)
is a vector potential for F.
Chapter 15 Solutions
MyLab Math with Pearson eText -- Standalone Access Card -- for Calculus: Early Transcendentals (3rd Edition)
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