linear algebra week1 homework, 22 questions, need answers only!!!!! due in 3 hours please!!!!!Ryan Ren
Math4A02S17Williams
WeBWorK assignment number Week1 is due : 04/10/2017 at 06:01am PDT.
The
Gauchospace link
for the course contains the syllabus, grading policy and other information.
The primary purpose of WeBWorK is to let you know that you are getting the correct answer or to alert you if you are making
some kind of mistake. Usually you can attempt a problem as many times as you want before the due date. However, if you are
having trouble ?guring out your error, you should consult the book, or ask a fellow student, one of the TA’s or your professor for
help. Don’t spend a lot of time guessing – it’s not very ef?cient or effective.
Give 4 or 5 signi?cant digits for (?oating point) numerical answers. For most problems when entering numerical answers,
you can if you wish enter elementary expressions such as 2
?
3 instead of 8,
sin
(
3
*
pi
/
2
)
instead of 1,
e
?
(
ln
(
2
))
instead of 2,
(
2
+
tan
(
3
))
*
(
4

sin
(
5
))
?
6

7
/
8 instead of 27620.3413, etc. Here’s the
list of the functions
which WeBWorK understands.
You can use the Feedback button on each problem page to send email to the professors.
1.
(1 pt)
Use elementary row operations to ?nd the reduced row ech
elon form of
?
?
?
?
8
0
0
8
16
24
11
8
12
0
24
36
?
?
?
?
?
?
?
?
?
?
?
?
Which columns are pivot columns? Enter the sum of the col
umn numbers. For instance if the ?rst and third columns were
pivot columns then your answer would be 1+3=4.
¡!
Answer(s) submitted:
•
•
•
•
•
•
•
•
•
•
•
•
•
(incorrect)
2.
(1 pt)
Consider the system
x

y

2
z
=
15
2
x
+
3
y
+
z
=
15
5
x
+
4
y
+
2
z
=
5
What is the augmented matrix of the sytem?
?
?
?
?
Find the reduced row echelon form of this augmented matrix.
?
?
?
?
?
1. What is the nature of the solution(s) of the system?
¡!
Answer(s) submitted:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
(incorrect)
3.
(1 pt)
1
Answer