DeterminantHard
Question
Matrix 
is non invertible if
is non invertible if Options
A.α = 1/2
B.a, b, c are in A.P.
C.a, b, c are in G.P.
D.a, b, c are in H.P.
Solution
Taking C3 → C3 - (C1α - C2)
we get
|A| =
= (1 - 2α) (ac - b2)
∴ non-invertible if α =
or if a, b, c are in G.P.
we get
|A| =
= (1 - 2α) (ac - b2)∴ non-invertible if α =
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