Math 210 Summer 2023 Exam #4
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Math 210
Summer 2023
Exam #4
1) Solve the following system of linear equations. If there are an infinite number of solutions specify two. (15 points)
x − 2y + z = −6
2x − 3y = −7
−x + 3y − 3z = 11
2) Using A = 2 1(4)] and B = [ 1(2) 7] find the following. For
full credit show every intermediate matrix. (20 points)
a) 2A − 3B
b) A2
c) AT − BT
d) AB
e) tr(A)
3) Find the inverse of A = 6 1 1] . Show all
intermediate matrices (and row operations) for full credit (15 points)
4)Use a suitable inverse matrix to solve A = B for (10 pts)
A =
5) Find the determinant of A = 2 2] showing all your work (10 pts)
6) Given the Matrix A = 3(1) 2(4)] (15 pts)
a) Find the eigenvalues of A
b) Find eigenvectors corresponding to the eigenvalues you found in part a
6) Prove that S = {(−1,2,0,0), (2,0, −1,0), (3,0,0,4), (0,0,5,0)} is a basis for R4. (15 points)
Bonus: Find the eigenvalues of A = [ 2] (10 pts)
2023-08-08