Question

Плииззз очень нужнноооооооо ​

Answer 1

$R_{1, 2} = \frac{R_1R_2}{R_1 + R_2} = \frac{7*7}{7+7} = 3.5\\R_{1, 2, 3} = R_{1, 2} + R_3 = 3.5 + 14 = 17.5\\R_{4, 5} = R_4 + R_5 = 14 + 7 = 21\\R_{6, 7} = R_6 + R_7 = 14 + 3 = 17\\R_{6, 7, 8, 9} = \frac{R_{6, 7}R_8R_9}{R_{6, 7}R_8 + R_8R_9 + R_{6, 7}R_9} = \frac{17*1*1}{17*1 + 1*1 + 17*1} = \frac{17}{35} \\R = \frac{R_{1, 2, 3}R_{4, 5}R_{6, 7, 8, 9}}{R_{1, 2, 3}R_{4, 5} + R_{4, 5}R_{6, 7, 8, 9} + R_{1, 2, 3}R_{6, 7, 8, 9}}$

$R = \frac{17.5*21*\frac{17}{35}}{17.5*21 + 21*\frac{17}{35} + 17.5*\frac{17}{35}} =$

≈ 0.462 Ом