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Problem with csolve

Message non luPosté: 04 Sep 2019, 18:03
de Andrele
Hi there,
I have an issue using csolve/czeros.
It is giving me only one root and it is otherwise giving me infinity and minus infinity whilz there are for sure 3 complex roots.
Please help me !

Re: Problem with csolve

Message non luPosté: 04 Sep 2019, 18:22
de critor
Sorry, but there is no complex root for the equation you're showing us.

Re: Problem with csolve

Message non luPosté: 04 Sep 2019, 18:37
de Andrele
I dont think so.
There must be to complex conjugated solutions.

Re: Problem with csolve

Message non luPosté: 04 Sep 2019, 18:39
de Andrele
I have found by long calculations on paper
3.99+3.16*10^-4i and 3.99-3.16*10^-4i
Why doesnt it show these roots with csolve ?

Re: Problem with csolve

Message non luPosté: 04 Sep 2019, 18:40
de Andrele
BTW, thanks a lot for ur answer

Re: Problem with csolve

Message non luPosté: 05 Sep 2019, 07:26
de Hisham
1+0.8x=0, multiplying both sides by 10 we get 10+8x=0 ;)
Now 8x=-10 and finally x=-5/4 :)
As Critor rightly said, there are no complex roots for given equation.
Best,

Hisham ;)