Let \( f(x)=\int e^{x}(x-1)(x-2) d x \). Then, \( f \) decreases in...
Let \( f(x)=\int e^{x}(x-1)(x-2) d x \). Then, \( f \) decreases in the interval
(a) \( (-\infty,-2) \)
(b) \( (-2,-1) \)
(c) \( (1,2) \) (2000, 2M)
\( \mathrm{P} \)
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(d) \( (2, \infty) \)
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