4=2/u

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Solution for 4=2/u equation: 


D( u )

u = 0

u = 0

u = 0

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

4 = 2/u // - 2/u

4-(2/u) = 0

4-2*u^-1 = 0

-2*u^-1 = -4 // : -2

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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