y=2/x+4

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Solution for y=2/x+4 equation: 


D( x )

x = 0

x = 0

x = 0

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

y = 2/x+4 // - 2/x+4

y-(2/x)-4 = 0

y-2*x^-1-4 = 0

-2*x^-1 = -(y-4) // : -2

x^-1 = (4-y)/(-2)

-1 < 0

1/(x^1) = (4-y)/(-2) // * x^1

1 = x^1*((4-y)/(-2)) // : (4-y)/(-2)

-2*(4-y)^-1 = x^1

x = -2*(4-y)^-1

x = -2*(4-y)^-1

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