pi=2y/x

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Solution for pi=2y/x equation: 


D( x )

x = 0

x = 0

x = 0

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

pi = (2*y)/x // - (2*y)/x

pi-((2*y)/x) = 0

pi-2*x^-1*y = 0

-2*x^-1*y = -pi // : -2*y

x^-1 = (1/2)*pi*y^-1

-1 < 0

1/(x^1) = (1/2)*pi*y^-1 // * x^1

1 = (1/2)*pi*x^1*y^-1 // : (1/2)*pi*y^-1

2*pi^-1*y = x^1

x = 2*pi^-1*y

x = 2*pi^-1*y

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