7=5/u-1

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Solution for 7=5/u-1 equation: 


D( u )

u = 0

u = 0

u = 0

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

7 = 5/u-1 // - 5/u-1

1-(5/u)+7 = 0

1-5*u^-1+7 = 0

-5*u^-1 = -8 // : -5

u^-1 = 8/5

-1 < 0

1/(u^1) = 8/5 // * u^1

1 = 8/5*u^1 // : 8/5

5/8 = u^1

u = 5/8

u = 5/8

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