Description
Instructions: Read textbook pages 65 to 67 before working on the homework problems. Show all steps to get full credits.
- Let Q be an arbitrary unitary matrix of size 3×3,
Ñ1é Ñ−3é x = 2 ,y = 0 ,
3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1
find the angle between Qx and Qy.
- Prove that the null space of A ∈ Fm×n is a subspace of Fn.
- Let
Å1 2ã
A =Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ,
1 2
find a basis for its range range(A).
- Prove range(AB) ⊆ range(A) for appropriate A,B that could be multiplied together.