(21x^3y^4z^2)/(7x^4y^-2z^-2)

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Solution for (21x^3y^4z^2)/(7x^4y^-2z^-2) equation: 


D( x )

7*x^4*y^-2*z^-2 = 0

7*x^4*y^-2*z^-2 = 0

7*x^4*y^-2*z^-2 = 0

7*x^4*y^-2*z^-2 = 0 // : 7*y^-2*z^-2

x^4 = 0

x = 0

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

(21*x^3*y^4*z^2)/(7*x^4*y^-2*z^-2) = 0

3*x^-1*y^6*z^4 = 0 // : 3*y^6*z^4

x^-1 = 0

x naleu017Cy do O

x belongs to the empty set

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