Question

Resolva as inequações

Answer 1

Explicação passo-a-passo:

$a)x - 5 > 0 \\ x > 5 \\ b)2x - 8 > 0 \\ 2x > 8 \\ x > 4 \\ c) 3x + 7 > 0 \\ 3x > - 7 \\ x > - \frac{7}{3} \\ d) - x + 3 > 0 \\ - x > - 3 \: \: \: \: .( - 1) \\ x < 3 \\ e) - 2x + 8 > 0 \\ - 2x > - 8 \: \: \: .( - 1) \\ 2x < 8 \\ x < 4 \\ f) - 3x - 5 < 0 \\ - 3x < 5 \: \: \: \: .( - 1) \\ 3x > 5 \\ x > \frac{5}{3} \\ g) - 8x + 16 \leqslant 0 \\ - 8x \leqslant - 16 \: \: \: .( - 1) \\ 8x \geqslant 16 \\ x \geqslant 2 \\ h)x + 1 > 0 \\ x > - 1 \\ i) - x + 2 > 0 \\ - x > - 2 \: \: \: .( - 1) \\ x < 2$