(a) Let A € Mmxn (F) and let Are be the reduced echelon form of A. Prove that Ax = 0 if and only if Arex = 0. (b) Suppose A € M3x4 (R) is such that Ax = 0 has the two solutions --0- X1 = and X2 and any other solution to Ax = 0 is a linear combination of x₁ and x2. i. Find the reduced echelon form Are of A. Make sure to explain/justify your answer! ii. Find the dimensions of the four fundamental subspaces of A.
(a) Let A € Mmxn (F) and let Are be the reduced echelon form of A. Prove that Ax = 0 if and only if Arex = 0. (b) Suppose A € M3x4 (R) is such that Ax = 0 has the two solutions --0- X1 = and X2 and any other solution to Ax = 0 is a linear combination of x₁ and x2. i. Find the reduced echelon form Are of A. Make sure to explain/justify your answer! ii. Find the dimensions of the four fundamental subspaces of A.
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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