20/w=4

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Solution for 20/w=4 equation: 


D( w )

w = 0

w = 0

w = 0

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

20/w = 4 // - 4

20/w-4 = 0

20*w^-1 = 4 // : 20

w^-1 = 1/5

-1 < 0

1/(w^1) = 1/5 // * w^1

1 = 1/5*w^1 // : 1/5

5 = w^1

w = 5

w = 5

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