140/u=28

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Solution for 140/u=28 equation: 


D( u )

u = 0

u = 0

u = 0

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

140/u = 28 // - 28

140/u-28 = 0

140*u^-1 = 28 // : 140

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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