The function \( f(x)=x(x+3) e^{-x / 2} \) satisfies all the conditions of Rolle's Theorem on \( ...

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The function \( f(x)=x(x+3) e^{-x / 2} \) satisfies all the conditions of Rolle's Theorem on \( [-3,0] \). The value of \( c \) which verifies Rolle's Theorem, is
(A) \( -1 \)
(B) \( -2 \)
(C) \( \frac{-3}{2} \)
(D) undefined
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