8=40/d

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Solution for 8=40/d equation: 


D( d )

d = 0

d = 0

d = 0

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

8 = 40/d // - 40/d

8-(40/d) = 0

8-40*d^-1 = 0

-40*d^-1 = -8 // : -40

d^-1 = 1/5

-1 < 0

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

1 = 1/5*d^1 // : 1/5

5 = d^1

d = 5

d = 5

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