20=18/b

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Solution for 20=18/b equation: 


D( b )

b = 0

b = 0

b = 0

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

20 = 18/b // - 18/b

20-(18/b) = 0

20-18*b^-1 = 0

-18*b^-1 = -20 // : -18

b^-1 = 10/9

-1 < 0

1/(b^1) = 10/9 // * b^1

1 = 10/9*b^1 // : 10/9

9/10 = b^1

b = 9/10

b = 9/10

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