Whatever the relation between them, the fact is the EXP, LOG and ROOT really are distinct functions with their own personalities. EXP grows fast, and is single

Whatever the relation between them, the fact is the EXP, LOG and ROOT really are distinct functions with their own personalities. EXP grows fast, and is single-valued. LOG and ROOT grow slowly and are multi-valued, but in different ways. Triangles and the star notation above are useful in cases where the ternary relation is very salient. And that might include teaching, but they are only part of the picture.