4/xx

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Solution for 4/xx equation: 


D( x )

x = 0

x = 0

x = 0

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

4/x < x // - x

4/x-x < 0

4*x^-1-x = 0

x^-1*(4-x^2) = 0

-1*x^2 = -4 // : -1

x^2 = 4

x^2 = 4 // ^ 1/2

abs(x) = 2

x = 2 or x = -2

1/x = 0

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

x^-1 = 0

x należy do O

(x-2)*(x+2) < 0

	(-oo:-2)	(-2:2)	(2:+oo)
x-2	-	-	+
x+2	-	+	+


x in (-2:0) U (0:2)

(-2:0) U (0:2)

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