Doubt Laravel + Ajax

Question

I have the following table below, with a listing, there is a TD, which the user can choose between yes and no, html tag option, would like to know how to make the change from yes to no or vice-versa, via ajax, so that it is not necessary to keep making client server request, and update via ajax. Below follows image of how the table is.

I am currently trying to do the ajax this way, but it is giving error:

jQuery(document).ready(function(){
jQuery('#viewpergunta').change(function(e){
   e.preventDefault();
   $.ajaxSetup({
    headers: {
      'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
    }
  });
   jQuery.ajax({
      url: '../perguntascadastro/1',
      method: 'post',
      data: {
         viewpergunta: jQuery('#viewpergunta').serialize(),
      },
      success: function(result){
         console.log(result);
      }});
   });
});

Below follows my route which gives to update in the bank, the same route I use for registration, serves to atulizar.

Route::any('/perguntascadastro/{id}', 'PerguntasController@addPerg')->where('id', '[0-9]+');

My controller

public function addPerg(PerguntasRequest $request, $id){

    if($id == 0){
        Perguntas::create($request->all());
    }else{
        Perguntas::find($request->id)->update(Request::except($id));
    }

    return redirect()->action('PerguntasController@index', $id = 0);
}

My Html only the table part

<td>
                    <select class="form-control" id="viewpergunta" name="viewpergunta">
                        <option value="{{ $lista->viewpergunta == 1 ? 1 : 0 }}">{{ $lista->viewpergunta == 1 ? "Sim" : "Não" }}</option>
                        <option value="{{ $lista->viewpergunta == 1 ? 0 : 1 }}">{{ $lista->viewpergunta == 1 ? "Não" : "Sim" }}</option>
                    </select>
                </td>