Recent content by palzle

Thanks for your reply. I tried your answer,and it works. Well,I have some...eerr... what if I'd define the domain for function f[x]? I mean that I want to prescribe x in f[x] must be real or pure imaginary or rational number.How to do that. I've a similar question here.How to claim a...

Hi,I'm a beginner. here's the example: f[x_] := E^(I*x) Conjugate[f[x]]*f[x] I'd like get 1,but it give me a complex function coz it regard x as complex. please help me:how to claim x is real? by the way,is that necessary to define a letter as a constant.no matter yes or not,how to...