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3 cards from this section. Quick, good the night before a test.
Define row space in your own words.
Think of how you can create new vectors using the rows.
What is the relationship between rank and column space?
Consider what rank signifies in terms of linear independence.
What is the row space of a matrix A?
Consider how you can create vectors from the rows.
True or False: The dimension of the null space increases with the number of linearly independent columns.
Think about how rank affects null space.
Given a matrix A = [[2, 4, -2], [1, 3, -1]], find its row space, column space, and null space.
Start by determining the rank and then use it to find the nullity.
Prove that adding a scalar multiple of one row to another does not change the row space.
Think about how linear combinations work in a vector space.
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