Question

Помогите очн нужно 4 5 пример номер 411

Answer 1

4.)

$\frac{x - y}{x} - \frac{5y}{ {x}^{2} } \times \frac{x {}^{2} - xy } {5y} = \frac{x - y}{x} - \frac{5y \times x(x - y)}{x {}^{2} \times 5y}$

$\frac{x - y}{x} - \frac{x - y}{x} = 0$

5.)

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