# Problem finding the roots of a function

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#### BrossanovA

##### Newbie level 1 Hi.

I need to find the complex roots of a funcion, to check a method, so I can use it later to desing a filter. I have some problems.

The function is this: Where ω1=1.61179 and ω2=-1.96546.

What I don't understand is the expression 1±j ε Cn(ω), so I don't know how to evaluate the function correctly. (I couldn't find the right character so I used epsilon)

#### tzushky

##### Member level 3 It's quite a stupid expression, normally it should ask ou for the zeros of C(w) which would then be complex numbers as those listed afterwards(try finding the zeros with a computer for Cn(w))

The symbol used is "part of" so ... Cn(w) should be seen as an ensemble of elements, or its zeros form that ensemble...

Is Cn(w) the denominator of a transfer function, since its zeros become the poles of something?

#### pareshatlnmiit

##### Member level 1 If you know MATLAB then it will be very easy to calculate and also helpful to ur future problems

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