Question

1) Resolva as inequações abaixo em N: a) 2x + 5 < -3x +40 2x + 3x < 40 - 5 5x < 35 x < 35/5 x < 7 S = {0, 1, 2, 3, 4, 5, 6} b) 6(x - 5) -2(4x +2) > 100 6x - 30 -8x - 4 > 100 6x -8x > 100 + 30 + 4 - 2x > 134 . (-1) 2x < -134/2 x < - 67 S = Φ c) 7x - 9 < 2x + 16 7x -2x < 16 + 9 5x < 25 x < 25/5 x < 5 S = [0,1, 2, 3, 4} d) -(8 - 4x - 7) ≤ 2x + 7 - 8 + 4x + 7 ≤ 2x + 7 4x - 2x ≤ 7 + 8 - 7 4x ≤ 8 x ≤ 8/4 x ≤ 2 S = { 0, 1, 2}

Answer 1

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