→ a88241050 :3個相加:2a+2b+2c為實數->a+b+c為實數 06/11 16:02
推 tzhau :三個相加除以2,再分別減去那三個 06/11 16:05
推 fishpool :YES 複數只有正負,只有兩種 06/11 16:10
→ mikechan :a+b in R =>Im(a)=-Im(b) b+c in R => Im(b)=-Im(c) 06/14 04:53
→ mikechan :=> Im(a)=Im(c) => 0=Im(a+c)=2Im(a) =>Im(a)=0 06/14 04:54