9=-3/y

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Solution for 9=-3/y equation: 


D( y )

y = 0

y = 0

y = 0

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

9 = -3/y // + -3/y

9-(-3/y) = 0

3*y^-1+9 = 0

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

y^-1 = -3

-1 < 0

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

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

-1/3 = y^1

y = -1/3

y = -1/3

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