10/1/2018
Homework 3.3
1/3
Current Score :
35 / 35
Due :
Thursday, October 11 2018 11:02 PM EDT
1.
6/6 points |
Previous Answers
Determine the first partial derivatives of
=
6
x
=
6
y
=
−6
z
2.
4/4 points |
Previous Answers
Determine the first partial derivatives of
at the point
=
1243
=
−443
∂
f
∂
x
∂
f
∂
y
∂
f
∂
z
h
(
r
,
s
) = ln(
r
+
s
+ 3)
2
2
P
(6, −2).
h
(6, −2)
r
h
(6, −2)
s
Homework 3.3 (Homework)
Ryan David
MA 242, section 002, Fall 2018
Instructor: Eric Randall
WebAssign
g
(
x
,
y
,
z
) = 6ln
.
2
xy
z

10/1/2018
Homework 3.3
2/3
3.
18/18 points |
Previous Answers
Determine the second partial derivatives of
=
(4
y
3
z
2)(8
x
2
y
3
z
2
sec
2(9+2
x
2
y
3
z
2)
tan
(9+2
x
2
y
3
z
2)+
sec
2(9+2
x
2
y
3
z
2))
=
(4
xz
2)
(12
x
2
y
5
z
2
sec
2(9+2
x
2
y
3
z
2)
tan
(9+2
x
2
y
3
z
2)+3
y
2
sec
2(9+2
x
2
y
3
z
2))
=
((4
xy
3)(8
x
2
y
3
z
3
sec
2(9+2
x
2
y
3
z
2)
tan
(9+2
x
2
y
3
z
2)+
sec
2(9+2
x
2
y
3
z
2)2
z
))
=
6
x
2
z
2(12
x
2
y
4
z
2
sec
2(9+2
x
2
y
3
z
2)
tan
(9+2
x
2
y
3
z
2)+
sec
2(9+2
x
2
y
3
z
2)2
y
)
=
6
y
2
z
2(8
x
3
y
3