8=-4/x

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Solution for 8=-4/x equation: 


D( x )

x = 0

x = 0

x = 0

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

8 = -4/x // + -4/x

8-(-4/x) = 0

4*x^-1+8 = 0

4*x^-1 = -8 // : 4

x^-1 = -2

-1 < 0

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

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

-1/2 = x^1

x = -1/2

x = -1/2

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