a=1/x-1/y

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Solution for a=1/x-1/y equation: 


D( x )

x = 0

x = 0

x = 0

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

a = 1/x-(1/y) // - 1/x-(1/y)

a-(1/x)+1/y = 0

a-x^-1+1/y = 0

-1*x^-1 = -(a+y^-1) // : -1

x^-1 = a+y^-1

-1 < 0

1/(x^1) = a+y^-1 // * x^1

1 = x^1*(a+y^-1) // : a+y^-1

1/(a+y^-1) = x^1

x = 1/(a+y^-1)

x = 1/(a+y^-1)

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