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Question

Solve: −4x > 30, when

(i) x ∈ R
(ii) x ∈ Z
(iii) x ∈ N

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Solution

-4x>30x<-304 (Dividing both the sides by -4)x<-152(i) xRThen, the solution of the given inequation is -, -152.(ii) xZThen, the solution of the given inequation is ..........-9, -8.(iii) xNThen, the solution of the given inequation is ϕ.

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