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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3/2)*(x+1)+(3*x)/x-3+1 = 0
3/2*(x+1)-3+1+3 = 0
3/2*(x+1)-3+1+3 = 0
3/2*x-3+1+9/2 = 0
3/2*x+1+3/2 = 0
3/2*x+5/2 = 0
3/2*x+5/2 = 0
3/2*x+5/2 = 0 // - 5/2
3/2*x = -5/2 // : 3/2
x = -5/2/3/2
x = -5/3
x = -5/3
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