Hey guys this is the question
. Let A and B be vector subspaces of a vector space V .
The intersection of A and B, A ∩ B, is the set {x ∈ V | x ∈ A and x ∈ B}.
The union of A and B, A ∪ B, is the set {x ∈ V | x ∈ A or x ∈ B}.
a) Determine whether or not A ∩ B is a vector subspace of V ...