DeterminantHard

Question

If  D = then D =

Options

A.1 + a2 + b2 + c2
B.a2 + b2 + c2
C.(a + b + c)2
D.none

Solution



Applying R1 → R1 + R2 + R3
(a2 + b2 + c2 + 1)
Applying C2 → C2 - C1 & C3 → C3 - C1
(a2 + b2 + c2 + 1)   = ( a2 + b2 + c2 + 1)

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