Which of the following is true for any two subspaces UUU and WWW of Rn\mathbb{R}^nRn?
dim(U+W)=dim(U)+dim(W)\dim(U+W) = \dim(U) + \dim(W)dim(U+W)=dim(U)+dim(W)
dim(U+W)=dim(U)+dim(W)−dim(U∩W)\dim(U+W) = \dim(U) + \dim(W) - \dim(U \cap W)dim(U+W)=dim(U)+dim(W)−dim(U∩W)
dim(U+W)=dim(U∩W)\dim(U+W) = \dim(U \cap W)dim(U+W)=dim(U∩W)
dim(U+W)≤dim(U)\dim(U+W) \leq \dim(U)dim(U+W)≤dim(U)