9=27/y

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Solution for 9=27/y equation: 


D( y )

y = 0

y = 0

y = 0

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

9 = 27/y // - 27/y

9-(27/y) = 0

9-27*y^-1 = 0

-27*y^-1 = -9 // : -27

y^-1 = 1/3

-1 < 0

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

1 = 1/3*y^1 // : 1/3

3 = y^1

y = 3

y = 3

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