The set of values of a for which the inequality \( x^{2}+a x+a^{2}+...

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The set of values of a for which the inequality \( x^{2}+a x+a^{2}+6 a0 \) is satisfied for all \( x \in(1,2) \) lies in the interval
\( \mathrm{P} \)
(A) \( (1,2) \)
(B) \( [1,2] \)
(C) \( [-7,4] \)
(D) None of these
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