Prove the following identities:

L.H.S =

Applying, C₁→C₁ + C₂ + C₃

Apply, C₂→C₂ – C₁, and C₃→C₃ – C₁, we have

Hence, proved.

11

Prove the following identities:

12

Prove the following identities:

14

Prove the following identities:

15

Prove the following identities: