4/1.25=2/x

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Solution for 4/1.25=2/x equation: 


D( x )

x = 0

x = 0

x = 0

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

4/1.25 = 2/x // - 2/x

4/1.25-(2/x) = 0

4/1.25-2*x^-1 = 0

-2*x^-1 = -3.2 // : -2

x^-1 = 1.6

-1 < 0

1/(x^1) = 1.6 // * x^1

1 = 1.6*x^1 // : 1.6

0.625 = x^1

x = 0.625

x = 0.625

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