[中學] 分母有複數的基本運算
√(3) / √(-2) = √(3) / i√(2) =>
i√(3) / -√(2) = - i√(3/2)
還是
√(3) / √(-2) = √(3 /(-2)) = √(-3/2) = i√(3/2)
簡單的來說就是根號裡的-1在分子或分母變成i,
有理化後會差一個負號,
到底哪一個才對呢?
以前好像有教,但是忘了,煩請版友幫忙解惑
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 220.136.67.86
推
11/28 23:47, , 1F
11/28 23:47, 1F
→
11/29 00:16, , 2F
11/29 00:16, 2F
推
11/29 01:52, , 3F
11/29 01:52, 3F
→
11/29 01:55, , 4F
11/29 01:55, 4F
→
11/29 01:55, , 5F
11/29 01:55, 5F
→
11/29 04:17, , 6F
11/29 04:17, 6F
→
11/29 06:30, , 7F
11/29 06:30, 7F
→
11/29 06:31, , 8F
11/29 06:31, 8F
→
11/29 10:19, , 9F
11/29 10:19, 9F