Question -
Answer -
(i) 
(ii) 
Solution
(i) 
Applying R1 → R1 − R3 andR2 → R2 − R3, we have:
Applying R1 → R1 + R2, we have:
Expanding along C1, we have:
Hence, the given resultis proved.
(ii) Let
Applying C1 → C1 − C3 andC2 → C2 − C3, we have:
Expanding along C1, we have:
Hence, the given resultis proved.