4/X20

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Solution for 4/X20 equation: 


D( X )

X^2 = 0

X^2 = 0

X^2 = 0

1*X^2 = 0 // : 1

X^2 = 0

X = 0

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

4/(X^2) < 0

4*X^-2 < 0

4*X^-2 < 0 // : 4

X^-2 < 0/4

X^-2 < 0

1/(X^2) < 0

X <> 0

1/(X^2) < 0 // * X^4

(X^4)/(X^2) < 0

X^2 < 0

X belongs to the empty set

X belongs to the empty set

0

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