The dominant 7th arpeggio consists of the root (1), major third (3), perfect fifth (5) and minor seventh (b7). A fingering is formed from each of these notes, creating four positions called root position, 1st inversion (from the third), 2nd inversion (from the fifth) or 3rd inversion (from the seventh). To learn these fingerings, practice the dominant 7th arpeggio exercise.
= Root 
Inversion Of The Dominant 7th Arpeggio
The dominant 7th arpeggio consists of the root (1), major third (3), perfect fifth (5) and minor seventh (b7). A fingering is formed from each of these notes, creating four positions called root position, 1st inversion (from the third), 2nd inversion (from the fifth) or 3rd inversion (from the seventh). To learn these fingerings, practice the dominant 7th arpeggio exercise.