3=-5/u+4

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Solution for 3=-5/u+4 equation: 


D( u )

u = 0

u = 0

u = 0

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

3 = 4-5/u // - 4-5/u

3-(-5/u)-4 = 0

5*u^-1-4+3 = 0

5*u^-1 = 1 // : 5

u^-1 = 1/5

-1 < 0

1/(u^1) = 1/5 // * u^1

1 = 1/5*u^1 // : 1/5

5 = u^1

u = 5

u = 5

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