Q1 Suppose A is a 3 by 3 matrix ones(3; 3) of all ones. Find two independent vectors x and y that solves Ax = 0 and Ay = 0. The rank of A is r = 1, so C(A) has one column only. N(A) will have n - r columns. Can there be a vector z that solves Az = 0?
Q1 Suppose A is a 3 by 3 matrix ones(3; 3) of all ones. Find two independent vectors x and y that solves Ax = 0 and Ay = 0. The rank of A is r = 1, so C(A) has one column only. N(A) will have n - r columns. Can there be a vector z that solves Az = 0?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Q1 Suppose A is a 3 by 3 matrix ones(3; 3) of all ones. Find two independent vectors x and y
that solves Ax = 0 and Ay = 0. The rank of A is r = 1, so C(A) has one column only. N(A)
will have n - r columns. Can there be a vector z that solves Az = 0?
b,Describe the column space of A = [v w v + 2w] with the columns v,w,v + 2w. Describe
the null space of A: all vectors x = (x1; x2; x3) that solve Ax = 0. (Number of columns =
dimension of column space + dimension of null space
c,Suppose the column space of an m n matrix is all of R3
. What can you say about m? What
can you say about n? What can you say about the rank r?
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