Math 2433 Online - Summer 2012
Homework Week 2
Instructions
•
Homework will NOT be accepted through email or in person. Homework must be submitted
through CourseWare BEFORE the deadline.
•
Submit the multiple choice section of the assignment at
http://www.casa.uh.edu
under
"EMCF" and choose
ehw2
.
•
Upload the written section of the assignment at
http://www.casa.uh.edu
under
"Assignments"
and choose
whw2
.
1.
Find values of
b
such that the vectors
( )
11, , 2
b
−
and
( )
2
,,
bb b
are orthogonal (perpendicular).
a.
{ }
0,3,11
b
=
b.
{ }
0, 2, 11
b
=
−
c.
{ }
0, 2, 2
b
=
−
d.
{ }
0,3, 3
b
=
−
e.
{ }
0,11, 2
b
=
f.
None of these.
2.
Find the area of the triangle with vertices
( ) ( )
0, 0, 0 , 1, 0, 1
−
and
( )
1,
1, 2
−
a.
11
b.
11
2
c.
6
d.
6
2
e.
1
f.
None of these.
3.
Find parametric equations for the intersection of the planes
0
xz
−
=
and
23
0
xy z
−
+ +=
a.
The line given by:
,3
3
,
xt
y
t
zt
=
−
=
−
=
−
b.
The line given by:
2, 13
,
y
t
z
t
=
− −
=
−
=
−
c.
The line given by:
1, 6, 12
y
t
z
t
=+
=
−
d.
The plane given by:
3333
0
xyz
+
−
+
=
e.
The line given by:
1, 6
, 1
y
=
=
−
f.
None of these.

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