If x is a real no. express z in the form of a+bi
更新1:
咁我咁答得唔得? z=(x+i)(1+2i) =x+2xi+i+2i^2 =x+(2x+1+2i)i so a=x b=(2x+1+2i)
更新2:
thx so much!! 唔該曬
咁我咁答得唔得? z=(x+i)(1+2i) =x+2xi+i+2i^2 =x+(2x+1+2i)i so a=x b=(2x+1+2i)
thx so much!! 唔該曬
收錄日期: 2021-04-21 22:09:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090909000051KK01891