Question

Срочно помогите плиз прошу​

Answer 1

$c2.3 = \frac{1}{c} + \frac{1}{c}$

$c2 - 4 = c2.3 + c4$

$c1 - 4 = \frac{1}{c} + \frac{1}{c2 - 4}$ОТВЕТ :

$\frac{3c}{5}$