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Problem with csolve

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Problem with csolve

de Andrele » 04 Sep 2019, 18:03

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 !

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Re: Problem with csolve

de critor » 04 Sep 2019, 18:22

Sorry, but there is no complex root for the equation you're showing us.

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Re: Problem with csolve

de Andrele » 04 Sep 2019, 18:37

I dont think so.
There must be to complex conjugated solutions.

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Re: Problem with csolve

de Andrele » 04 Sep 2019, 18:39

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 ?

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Dernière édition par Andrele le 04 Sep 2019, 18:41, édité 1 fois.

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Re: Problem with csolve

de Andrele » 04 Sep 2019, 18:40

BTW, thanks a lot for ur answer

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Re: Problem with csolve

de Hisham » 05 Sep 2019, 07:26

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

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