Question

Помогите пожалуйста срочно ​

Answer 1

4)

$x = - \frac{1}{2} \\ 2x + \frac{8}{x + 1} = 2 \times ( - \frac{1}{2} ) + \frac{8}{ - \frac{1}{2} +1 } = \\ - 1 + \frac{8}{ \frac{1}{2} } = - 1 + 8 \times 2 = - 1 + 16 = 15$

$x = 0.5 \\ 2x + \frac{8}{x + 1} = 2 \times 0.5 + \frac{8}{0.5 + 1} = \\ 1 + \frac{8}{1.5} = 1 + \frac{8 \times 2}{3} = \\ 1 + 5 \frac{1}{3} = 6 \frac{1}{3}$

5)

$y = 1.5 \\ \frac{y + 3}{2y} + \frac{2y}{y - 3} = \frac{1.5 + 3}{2 \times 1.5} + \frac{2 \times 1.5}{1.5 - 3} = \\ \frac{4.5}{3} + \frac{3}{ - 1.5} = 1.5 - 2 = - 0.5$

$y = 2.5\\ \frac{y + 3}{2y} + \frac{2y}{y - 3} = \frac{2.5 + 3}{2 \times 2.5} + \frac{2 \times 2.5}{2.5 - 3} = \\ \frac{5.5}{5} + \frac{5 }{ - 0.5} = 1.1 - 10 = - 8.9$