(1/x-1)+(1/x+2)+4=0

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Solution for (1/x-1)+(1/x+2)+4=0 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

1/x+1/x-1+2+4 = 0

2*x^-1 = -5 // : 2

x^-1 = -5/2

-1 < 0

1/(x^1) = -5/2 // * x^1

1 = -5/2*x^1 // : -5/2

-2/5 = x^1

x = -2/5

x = -2/5

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