Q14 of 127 Page 141

Prove that

Let Δ =

Applying Elementary Row Transformations


R2→ R2 – 2R1


Δ =


R3→ R3 – 3R1


Δ =


R3→ R3 – 3R2


Δ =


Expanding Along C1, we have


Δ = 1 (1 × 1 – 0 × (2 + p)) – 0 + 0


Δ = 1 – 0


Δ = 1


Hence, the given result is proved


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