-8=-4/u

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Solution for -8=-4/u equation: 


D( u )

u = 0

u = 0

u = 0

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

-8 = -4/u // + -4/u

-(-4/u)-8 = 0

4*u^-1-8 = 0

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

u^-1 = 2

-1 < 0

1/(u^1) = 2 // * u^1

1 = 2*u^1 // : 2

1/2 = u^1

u = 1/2

u = 1/2

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