1. Question: Which of the following linear transformations T from |R^3 to |R^3 are invertible? Find The inverse if it exists. a. Reflection about a plane b. Orthogonal projection onto a plane c. Scaling by a factor of 5 d. Rotation about an axis 2. Relevant equations 3. The attempt at a solution Well I know only a, c, and d are invertible but I do not know how to go about finding their inverses. Only i have assumed so far it involves some vector <x,y,z> about some arbitrary thing such as in part a, a plane through the origin with an arbitrary normal <a,b,c> but Im not even sure about that.