Maj7 Shell

Root + 3rd + 7th

Prove it — just do the practice exercise.
CMaj7 Shell Voicing
C (R)E (3)B (7)
Shell Voicing = only the 3 most important notes:

Root — Identity
3rd — Major or minor?
7th — Major or minor?

The fifth is dropped — it doesn't define the character.

Example: CMaj7 Shell = C + E + B