54/6=81/b

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Solution for 54/6=81/b equation: 


D( b )

b = 0

b = 0

b = 0

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

54/6 = 81/b // - 81/b

54/6-(81/b) = 0

54/6-81*b^-1 = 0

-81*b^-1 = -9 // : -81

b^-1 = 1/9

-1 < 0

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

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

9 = b^1

b = 9

b = 9

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