nodl:3(U1-U2)+4(b1-U3)=-8-3 D,-5N+ orTu1-3U2-4U2=-11(1 -34 3S node2:3(U2-b1)+1U2+i,-3=0 or-3U1+4U2+i=3 (2) IS node3:5U3+4(U3-U1)-i,-25=0 +9U2-i=25 3 254 2)+(3)→-+42+9=28(4) Ref D3-D2=22 (5 Equations(1),(4),(5)may be solved 11-3-4 849 22 189 =-4.5 155U3=65 3 74922 ( 5 )  3 − 2 = ( 2 ) ( 3 ) 7 4 9 28 ( 4 ) +  − 1 +  2 +  3 = node2 : 3(2 −1 )+12 + i s − 3 = 0 node3 : 53 + 4(3 −1 )− i s − 25 = 0 7 3 4 11 (1) or 1 − 2 − 3 = − 3 4 3 (2) or − 1 + 2 + i s = 4 9 25 (3) or − 1 + 3 − i s = Equations (1), (4), (5) may be solved 4 5 42 189 0 1 1 7 4 9 7 3 4 22 1 1 28 4 9 11 3 4 1 = − . − = − − − − − − − −  = 1 3 4 8 3 node : (1 − 2 )+ (1 − 3 ) = − −  2 = −15.5  3 = 6.5 − 22V + s i 1  2  3 − 25A −8A − 3A 1S 5S 4S 3S Re f