3. По какому выражению определяется волновое сопротивление линии?<img src="/close/store/examRes/%7BFA292B0F-0B8E-4986-A301-92D90D9BF664%7D/liniy1.gif" /><img src="/close/store/examRes/%7BFA292B0F-0B8E-4986-A301-92D90D9BF664%7D/liniy2.gif" /><img src="/close/store/examRes/%7BFA292B0F-0B8E-4986-A301-92D90D9BF664%7D/liniy3.gif" /><img src="/close/store/examRes/%7BFA292B0F-0B8E-4986-A301-92D90D9BF664%7D/liniy4.gif" /> <img src="/img/ce/2e76b69cec59dfd7bbfa914366.gif" />, <img src="/img/19/2cf225a87346dc5286a4b747b0.gif" />, <img src="/img/62/858bc68bd5cebc1671ce701c1a.gif" />, <img src="/img/7d/57fc2c35fc3499dd50779c90f4.gif" />