Question 36: Find x ∈ Z, know: -12 < 3x 18

04/01/2022 // by admin// Leave a Comment

Question 36: Find x ∈ Z, know: -12 < 3x 18

A. x ∈ {-4; -3, -2, -1, 0, 1, 2, 3, 4, 5}

B. x ∈ { -2, -1, 0, 1, 2, 3, 4, 5, 6}

C. x ∈ {-3, -2, -1, 0, 1, 2, 3, 4}

D. x ∈ {-3, -2, -1, 0, 1, 2, 3, 4, 5, 6}

-12 < 3x 18

⇒ 3x = -9; 3x = -6; 3x = -3; 3x = 0; 3x = 3; 3x = 6; 3x = 9; 3x = 12; 3x = 15; 3x = 18

⇒ x ∈ {-3, -2, -1, 0, 1, 2, 3, 4, 5, 6}

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