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[" The function "f" ,defined by "f(x)=(x...

[" The function "f" ,defined by "f(x)=(x+2)e^(-x)" ,is "],[[" (a) decreasing for all "x],[" (c) decreasing in "(-oo,-1)" and increasing in "(-1,oo)],[" (d) decreasing in "[-1,oo)" and increasing in "(-oo,-1]],[" O "A]]

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