2/9-4/y

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Solution for 2/9-4/y equation: 


D( y )

y = 0

y = 0

y = 0

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

2/9-(4/y) = 0

2/9-4*y^-1 = 0

-4*y^-1 = -2/9 // : -4

y^-1 = 1/18

-1 < 0

1/(y^1) = 1/18 // * y^1

1 = 1/18*y^1 // : 1/18

18 = y^1

y = 18

y = 18

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