The system of equations 3x-y+4z=3, x+2y-3z=-2 and 6x+5y+λz=-3 has at least one solution when
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a
λ=−5
b
λ=3
c
λ=5
d
λ=6
answer is A.
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Detailed Solution
Augmented matrix = 3-14312-3-265λ-3~3R2−R1,R3−2R13-14307-13-907λ-8-9 ~R3−R23-14307-13-900λ+50 The system of equations has at least one solution ⇒λ+5=0⇒λ=−5