I need help with question from homework in linear algebra. This question (linear transformation): http://i43.tinypic.com/15reiic.gif According to theorem dimensions: dim(V) = dim(Ker(T)) + dim(Im(T)). dim(Ker(T))=2. dim(V) in R^4, meaning =4. We can therefore conclude that dim(Im(T))=2. But how can find this specific linear transformation? Please help me to solve this problem. Thanks.