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Question

Solve: 4x − 2 < 8, when

(i) x ∈ R
(ii) x ∈ Z
(iii) x ∈ N

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Solution

We have, 4x-2<84x<8+2 (Transposing -2 to the RHS)4x<10x<104 (Dividing both the sides by 4)x<52(i) xRThen, the solution of the given inequation is -, 52.(ii) xZThen, the solution of the given inequation is .......-3, -2, -1, 0, 1, 2.(iii) xNThen, the solution of the given inequation is 1, 2.

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