Fm7 chord inversions
Fm7/Ab, Fm7/C and Fm7/Eb are the first, second and third inversions of the Fm7. This means that the bass tone is shifting from F to A flat, C or E flat.
Theory and information
All these chords consist of the notes F, Ab, C, Eb. The difference is that the order of notes shifts. Ab is the bass note in the first inversion, C is the bass note in the second inversion and Eb is the bass note in the third inversion.
In standard tuning, the most natural way to play F minor 7th inversions is with barre shapes. There are few possible options for open chords.
Alternative chord names
Fm7/Ab is identical with Fm7/G# and Ab6.
Fm7/Eb is identical with Fm7/D# and Fm/Eb.
Try in a chord progression
Gm7b5 - Eb7 - Fm7/Eb
Chords that sound good together with F minor 7th inversions
Some typical chords that are likely to be included in progressions with these chords are: Abmaj7, Bbm7, Cm7, Dbmaj7, Eb7.