-4=9/w

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Solution for -4=9/w equation: 


D( w )

w = 0

w = 0

w = 0

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

-4 = 9/w // - 9/w

-(9/w)-4 = 0

-9*w^-1-4 = 0

-9*w^-1 = 4 // : -9

w^-1 = -4/9

-1 < 0

1/(w^1) = -4/9 // * w^1

1 = -4/9*w^1 // : -4/9

-9/4 = w^1

w = -9/4

w = -9/4

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