y=2/5x^-1

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Solution for y=2/5x^-1 equation: 


D( x )

x = 0

x = 0

x = 0

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

y = (2/5)*x^-1 // - (2/5)*x^-1

y-((2/5)*x^-1) = 0

(-2/5)*x^-1+y = 0

-2/5*x^-1 = -y // : -2/5

x^-1 = 5/2*y

-1 < 0

1/(x^1) = 5/2*y // * x^1

1 = 5/2*x^1*y // : 5/2*y

2/5*y^-1 = x^1

x = 2/5*y^-1

x = 2/5*y^-1

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