Question

求学霸 解一下这个方程啊

Answer 1

10I1-3I2-2I3=10........(1)
-3I1+4I2=-5+V..........(2)
-2I1+6I3=-V..............(3)
-I2+I3=3....................(4)
(2)+(3)：-5I1+4I2+6I3=-5........(5)
(4)：I3=I2+3.............(6)
(6)代入(1)：10I1-3I2-2(I2+3)=10
10I1-5I2=16..............(7)
(6)代入(5)：-5I1+4I2+6(I2+3)=-5
-5I1+10I2=-23..........(8)
(7)*2+(8)：20I1-5I1=32-23
15I1=9
I1=3/5.......................(9)
(9)代入(7)：10*(3/5)-5I2=16
6-5I2=16
I2=-2........................(10)
(10)代入(6)：I3=-2+3=1........(11)
(9)(10)代入(2)：-3*(3/5)+4*(-2)=-5+V
-9/5-8=-5+V
V=-24/5

Answer 2

方程你列错了：I1=0.6，I2=-2，I3=1，V=-4.8