13/7=5/u

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Solution for 13/7=5/u equation: 


D( u )

u = 0

u = 0

u = 0

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

13/7 = 5/u // - 5/u

13/7-(5/u) = 0

13/7-5*u^-1 = 0

-5*u^-1 = -13/7 // : -5

u^-1 = 13/35

-1 < 0

1/(u^1) = 13/35 // * u^1

1 = 13/35*u^1 // : 13/35

35/13 = u^1

u = 35/13

u = 35/13

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