5/2=4/b

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Solution for 5/2=4/b equation: 


D( b )

b = 0

b = 0

b = 0

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

5/2 = 4/b // - 4/b

5/2-(4/b) = 0

5/2-4*b^-1 = 0

-4*b^-1 = -5/2 // : -4

b^-1 = 5/8

-1 < 0

1/(b^1) = 5/8 // * b^1

1 = 5/8*b^1 // : 5/8

8/5 = b^1

b = 8/5

b = 8/5

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