-3/u=9

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Solution for -3/u=9 equation: 


D( u )

u = 0

u = 0

u = 0

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

-3/u = 9 // - 9

-3/u-9 = 0

-3*u^-1 = 9 // : -3

u^-1 = -3

-1 < 0

1/(u^1) = -3 // * u^1

1 = -3*u^1 // : -3

-1/3 = u^1

u = -1/3

u = -1/3

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