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Vectors, Matrices, and Linear Maps
Vectors, Matrices, and Linear Maps
10 questions
Difficulty 1-3
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Foundation
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compute
The identity matrix
I
satisfies
I
A
=
A
I
=
A
for any compatible matrix
A
. What does
I
look like?
Hide and think first
A.
Square matrix with 1s on the diagonal and 0s elsewhere
B.
Upper-triangular matrix with 1s in the top row
C.
Square matrix filled with 1s everywhere
D.
Diagonal matrix with arbitrary positive entries on the diagonal
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