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The function f(x)=x(x+4)e^(-x//2) has i...

The function `f(x)=x(x+4)e^(-x//2)` has its local maxima at `x=adot` Then (a)`a=2sqrt(2)` (b) `a=1-sqrt(3)` (c)`a=-1+sqrt(3)` (d) `a=-4`

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