In theory, the name ... chord is called C9, instead of Cadd9. Further to Example 3, here is a Cadd9 in the same position. There is no b7 th, just the root-3rd-5th (C-E-G) plus the 9th (D) added on ...
Harmonic minor keys are used when writing chords. There is another version ... alterations have been the basis of a whole range of musical styles. For example, the triads in C major are as follows ...