A limit, its odd limit and even limit are equal to 1. Why is its limit equal to 1 instead of 2? Please answer in detail

A limit, its odd limit and even limit are equal to 1. Why is its limit equal to 1 instead of 2? Please answer in detail

Because the odd limit and even limit are both 1, the limit of this function is 1. If the odd limit and even limit are not the same, then the limit is nonexistent ∵ x2k-1 tends to a (k tends to infinity) ∵ according to the definition, for any E > 0, there is always natural number N1. When k > N1, there is | x2k-1-a | 0, there is always natural number n