28x^-2/7y-3

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Solution for 28x^-2/7y-3 equation: 


D( x )

x = 0

x = 0

x = 0

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

((28*x^-2)/7)*y-3 = 0

4*x^-2*y = 3 // : 4*y

x^-2 = 3/(4*y)

-2 < 0

1/(x^2) = 3/(4*y) // * x^2

1 = x^2*(3/(4*y)) // : 3/(4*y)

(4*y)/3 = x^2

x^2 = (4*y)/3 // ^ 1/2

abs(x) = (2*y^(1/2))/(3^(1/2))

x = (2*y^(1/2))/(3^(1/2)) or x = -((2*y^(1/2))/(3^(1/2)))

x in { (2*y^(1/2))/(3^(1/2)), -((2*y^(1/2))/(3^(1/2))) }

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