The Total solution for NCERT class 6-12
Using the property ofdeterminants and without expanding, prove that:
Applying R2 → R2 − R3, we have:
Applying R1 ↔R3 and R2 ↔R3, we have:
Applying R1 → R1 − R3, we have:
Applying R1 ↔R2 and R2 ↔R3, we have:
From (1), (2), and (3),we have:
Hence, the given resultis proved.