设x,y为实数,且x/1−i+y/1−2i=5/1−3i,则x+y=_.
问题描述:
设x,y为实数,且
+x 1−i
=y 1−2i
,则x+y=______. 5 1−3i
答
+x 1−i
=y 1−2i
+x(1+i) 2
=(y(1+2i) 5
+x 2
)+(y 5
+x 2
)i,2y 5
而
=5 1−3i
=5(1+3i) 10
+1 2
i所以3 2
+x 2
=y 5
且1 2
+x 2
=2y 5
,3 2
解得x=-1,y=5,
所以x+y=4.
故答案为:4