Solve the following equations
`(i) sgn({[x]})=0` `(ii) sgn(x^(2)-2x-8)=-1` `(iii)sgn((x^(2)-5x+4)/({x}))=-1`

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1 Answers

Correct Answer - `(i) x in R` `(ii) x in (-2,4)` `(iii) (1,2)uu(2,3)uu(3,4)`

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