<img src="/close/store/examRes/%7BED6BA1F5-4439-48FC-BFEF-36F811127933%7D/%D0%B2%D0%BE%D0%BF%D1%80%D0%BE%D1%81%2023.jpg" /> -E1 I1+E3 I3+E5 I5=-R1 I1^2+R2 I2^2+R3 I3^2+R4 I4^2+R5 I5^2, -E1 I1+E3 I3+E5 I5=R1 I1^2+R2 I2^2+R3 I3^2+R4 I4^2+R5 I5^2, E1 I1+E3 I3+E5 I5=-R1 I1^2+R2 I2^2+R3 I3^2+R4 I4^2+R5 I5^2, E1 I1+E3 I3+E5 I5=R1 I1^2+R2 I2^2+R3 I3^2+R4 I4^2+R5 I5^2