2=4/u

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Solution for 2=4/u equation: 


D( u )

u = 0

u = 0

u = 0

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

2 = 4/u // - 4/u

2-(4/u) = 0

2-4*u^-1 = 0

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

u^-1 = 1/2

-1 < 0

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

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

2 = u^1

u = 2

u = 2

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