7=5/u-7

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Solution for 7=5/u-7 equation: 


D( u )

u = 0

u = 0

u = 0

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

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

7-(5/u)+7 = 0

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

-5*u^-1 = -14 // : -5

u^-1 = 14/5

-1 < 0

1/(u^1) = 14/5 // * u^1

1 = 14/5*u^1 // : 14/5

5/14 = u^1

u = 5/14

u = 5/14

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