Economics 2305
Principles of Macroeconomics
MWF 9 (Aplia instructions and common assignment are included below)
Fall, 2016
Bill Alexander
Office: UCBB 302 (Univ. classroom and bus. bld.)
Office hours: Mon. and Wed. 12:15-1:15 and by appointment
Email: wal
MATH 3321
Quiz 5
9/18/13
1. The differential equation that has y = C1 x3 + C2 as its general solution is:
(a)
(b)
(c)
(d)
(e)
y 00 2y = 0.
xy 00 2y 0 = 0.
x2 y 00 2y = 0.
y 00 2xy 0 = 0.
none of the above.
2. The solution of the initial-value problem xy 0
MATH 3321
Quiz 17
11/25/13
1. If 0 is not an eigenvalue of the matrix of coefficients of a homogeneous system of n linear
equations in n unknowns, then the system has infinitely many solutions.
(a) Always true.
(b) Sometimes true.
(c) Never true.
(d) None
MATH 3321
Quiz 15
11/13/13
1. If the rank of the augmented matrix of a system of n linear equations in n unknowns
is greater than the rank of the matrix of coefficients, then the matrix of coefficients is
nonsingular.
(a) Always true
(b) Sometimes true
(c
MATH 3321
Quiz 16
11/21/13
1. If a system of n linear equations in n unknowns has infinitely many solutions, then the
rank of the matrix of coefficients is n 1.
(a) Always true.
(b) Sometimes true.
(c) Never true.
(d) None of the above.
2. If 0 is an eige
MATH 3321
Quiz 14
1 3
2
4
1. Let A =
!
11/7/13
. The element in the (1,2) position of A1 is:
(a) 3/2
(b) 3
(c) 3/2
(d) 1/2
(e) None of the above.
1 2 0
2. Let A = 1 1 2 . The element in the (1,2) position of A1 is:
2 4 1
(a) 7
(b) 2
(c) 4
(d) A1 does not
MATH 3321
Quiz 11
10/24/12
1. z1(x) = 4xe2x + 2x ln x, z2 (x) = 2x ln x + 3x are solutions of a second order, linear,
nonhomogeneous differential equation L[y] = f(x). y1 (x) = xe2x is a solution of the
corresponding reduced equation L[y] = 0. The general
MATH 3321
Quiz 9
10/16/13
1. If f(x) = 2e3x + cos 2x + 3x, then L[f(x)] =
(a)
(b)
(c)
(d)
(e)
2
3
2
+ 2
+ 3
s3 s +4 s
2
s
3
+ 2
+ 2
s3 s +4 s
2
3
2
+ 2
+
s+3 s +4 s
s
3
2
+ 2
+ 2
s+3 s +4 s
None of the above.
2. If f(x) = 2e2x sin 3x 2xe3x + 4, then L[f(x
MATH 3321
Quiz 9
10/14/13
1. The general solution of y (4) 5y 00 36y = 0 is:
(a) y = C1 cos 3x + C2 sin 3x + C3 e2x + C4e2x
(b) y = C1 cos 3x + C2 sin 3x + C3 cos 2x + C4 sin 2x
(c) y = C1 cos 2x + C2 sin 2x + C3 e3x + C4e3x
(d) y = C1 cos 2x + C2 sin 2x
MATH 3321
Quiz 7
10/4/13
1. The form of a particular solution of y 00 + 4y = 3 sec 2x is
(a) z = A sec 2x
(b) z = A sec 2x + B cos 2x
(c) z = A sec 2x + B tan 2x
(d) z = A sec 2x + B sec1 2x
(e) None of the above.
2. A particular solution of y 00 + 9y = 3
MATH 3321
Quiz 8
10/7/13
1. A particular solution of y 00 + 9y 0 = 4 cos 3x + 3 sin 2x + 2 will have the form:
(a) z = A cos 3x + B sin 3x + C cos 2x + D sin 2x + Ex + F
(b) z = Ax cos 3x + Bx sin 3x + C cos 2x + D sin 2x + Ex
(c) z = A cos 3x + B sin 3x
Good Morning Y'all,
So the test has 10 questions: 5 MC questions, 4 FR and 1 Bonus question.
The MC questions covers (55pts)
-Inverse Matrix
-Giving the value of D(2,3) using the D=AB-?C equation
-v1 v2 v3 linear independent or dependent (mine was depende
Electrical and Computer
Engineering Department
ECE 2300
Circuit Analysis
Node Voltage Method
ECE 2300 - Gulin Tulunay Aksu
1
Node Voltage Method
without Voltage Sources and
Dependent Sources
ECE 2300 - Gulin Tulunay Aksu
2
Node Voltage Method (NVM)
Using
1. Insert a comment at the beginning that says Reviewed by your
Peer Reviewing
name.
2. After reading through the entire letter, insert a comment at the
beginning. Describe and explain your general reaction to the letter.
Do you understand the problem and
How to answer 23 of the
most common interview
questions
By Paul Michael
Lets face it; no one likes the interview process. Well, certainly not the people being interviewed
anyway. You have to be on your best behavior, you only get one chance to get it righ
MATH 3321
Quiz 13
11/4/13
x 2y + z = 7
1. The solution set of the system
2x y + 4z = 17
is:
3x 2y + 2z = 14
(a) x = 2, y = 1, z = 3
(b) no solution
(c) x = 2 a, y = 3 2a, z = a,
a any real number
(d) x = 2, y = 1, z = 2
(e) None of the above.
x + 2y 3z 4w