ICSEClass XMathematicsLinear Inequations01 Mark2025 Moderate

QQuestion

The solution set for 0 < − \text{x}\over3 < 2, x ∈ Z is:

(a) {−5, −4, −3, −2, −1}

(b) {−6, −5, −4, −3, −2, −1}

(c) {−5, −4, −3, −2, −1, 0}

(d) {−6, −5, −4, −3, −2, −1, 0} bb

Exam-ready answer 01 Mark

Answer

(a) {−5, −4, −3, −2, −1}

Explanation:

Given:

0 < – \text{x}\over3 < 2

⇒ 0 × 3 < – \text{x}\over3 × 3 < 2 × 3

⇒ 0 < – x < 6

⇒ – 1 × 0 > (- 1 )(- x) > – 1 × 6

⇒ −6 < x < 0

Since x ∈ Z, the solution set is {−5, −4, −3, −2, −1}.

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