Question

Помогите пожалуйста!

Answer 1

Объяснение:

$x = (0.5)^{ - 1} = ( \frac{1}{2} )^{ - 1} = ( \frac{2}{1})^{1} = 2$

$\frac{5 {x}^{ - 2} }{4 - {x}^{ - 2} } - \frac{5 {x}^{ - 2} }{4 + {x}^{ - 2} } = \\ = \frac{ {5(2)}^{ - 2} }{4 - ( {2})^{ - 2} } - \frac{5 {(2)}^{ - 2} }{4 + {(2)}^{ - 2} } = \\ = \frac{ \frac{5}{4} }{4 - \frac{1}{4} } - \frac{ \frac{5}{4} }{4 + \frac{1}{4} } = \\ = \frac{ \frac{5}{4} }{ \frac{15}{4} } - \frac{ \frac{5}{4} }{ \frac{17}{4} } = \frac{5 \times 4}{4 \times 15} - \frac{5 \times 4}{4 \times 17 } = \\ = \frac{1}{3} - \frac{5}{17} = \frac{17 - 15}{51} = \frac{2}{51}$