40/12=10/u

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Solution for 40/12=10/u equation: 


D( u )

u = 0

u = 0

u = 0

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

40/12 = 10/u // - 10/u

40/12-(10/u) = 0

40/12-10*u^-1 = 0

-10*u^-1 = -10/3 // : -10

u^-1 = 1/3

-1 < 0

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

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

3 = u^1

u = 3

u = 3

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