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An Intiative by Sri Chaitanya
a
Δ>0 if a=−1, b=−2, c=−3
b
Δ<0 if a=1, b=2, c=3
c
Δ=0 if and only if a=b=c
d
Δ=0 if and only if a3+b3+c3=3abc
answer is C.
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