Mark the correct alternative in each of the following: If \( \alpha \) is a repeated root of \( ...
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0Mark the correct alternative in each of the following:
If \( \alpha \) is a repeated root of \( a x^{2}+b x+c=0 \), then \( \lim _{x \rightarrow \alpha} \frac{\tan \left(a x^{2}+b x+c\right)}{(x-\alpha)^{2}} \) is
(A) \( a \)
(B) \( b \)
(C) \( c \)
(D) undefined
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