7.2*x^-1.2/x^-4=3.2

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Solution for 7.2*x^-1.2/x^-4=3.2 equation: 


D( x )

x < 0

x = 0

x^-4 = 0

x < 0

x = 0

x = 0

x^-4 = 0

x^-4 = 0

1*x^-4 = 0 // : 1

x^-4 = 0

x należy do O

x in (0:+oo)

(7.2*x^-1.2)/(x^-4) = 3.2 // - 3.2

(7.2*x^-1.2)/(x^-4)-3.2 = 0

7.2*x^2.8 = 3.2 // : 7.2

x^2.8 = 0.44444444

x^2 = 0.44444444^(1/0.8) // ^ 1/2

abs(x) = 0.44444444^0.625

x = 0.44444444^0.625 or x = -0.44444444^0.625

x in { -0.44444444^0.625} 

x = 0.44444444^0.625

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