16/20=8/w

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Solution for 16/20=8/w equation: 


D( w )

w = 0

w = 0

w = 0

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

16/20 = 8/w // - 8/w

16/20-(8/w) = 0

16/20-8*w^-1 = 0

-8*w^-1 = -4/5 // : -8

w^-1 = 1/10

-1 < 0

1/(w^1) = 1/10 // * w^1

1 = 1/10*w^1 // : 1/10

10 = w^1

w = 10

w = 10

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