数学 第4题,
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z1=2, z2=1+i
|z1z2| =|3+i| =√10
let
z3 = x+yi
|z1z3|^2 = |z2z3|^2 = 10
(x-2)^2+y^2 =10 (1)
(x-1)^2+(y-1)^2 =10 (2)
(1)-(2)
-2x +3 +2y -1 =0
x-y =1 (3)
sub (3) into (1)
(x-2)^2+y^2 =10
(x-2)^2+(x-1)^2 =10
-2x +5 =10
x=-5/2
from (3)
-5/2 -y = 1
y= -7/2
z3 = x+yi = -5/2 - (7/2)i
|z1z2| =|3+i| =√10
let
z3 = x+yi
|z1z3|^2 = |z2z3|^2 = 10
(x-2)^2+y^2 =10 (1)
(x-1)^2+(y-1)^2 =10 (2)
(1)-(2)
-2x +3 +2y -1 =0
x-y =1 (3)
sub (3) into (1)
(x-2)^2+y^2 =10
(x-2)^2+(x-1)^2 =10
-2x +5 =10
x=-5/2
from (3)
-5/2 -y = 1
y= -7/2
z3 = x+yi = -5/2 - (7/2)i
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