Rootless B — Dom7

♭7 – 9 – 3 – 5

Prove it — just do the practice exercise.
C7 Rootless B
Bb (♭7)D (9)E (3)G (5)
Rootless B for Dominant 7:

• ♭7 – 9 – 3 – 5

Minor 7th on the bottom, 3rd on top. Ideal alternating with Rootless A.

Example: C7 RL-B = Bb + D + E + G