Question: please help me understand this problem 2. Determine the dimensions of the given vector spaces. a. M23 b. D4 , that subspace of M44 consisting

please help me understand this problem

2. Determine the dimensions of the given vector spaces. a. M23 b. D4 , that subspace of M\"44 consisting of the diagonal matrices. c. V : span{(1,4,2),(2,3,1),(1,1,3)} cl. That subspace of R4 containing all vectors (a,b,c,d) where c : a b and d : a +3)

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