X=4/x

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Solution for X=4/x equation: 


D( x )

x = 0

x = 0

x = 0

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

X = 4/x // - 4/x

X-(4/x) = 0

X-4*x^-1 = 0

-4*x^-1 = -X // : -4

x^-1 = X/4

-1 < 0

1/(x^1) = X/4 // * x^1

1 = (X/4)*x^1 // : X/4

4*X^-1 = x^1

x = 4*X^-1

x = 4*X^-1

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