Can U Spot The Mistake?????

If x^x^x^x^x^…..upto infinity =2 and also let’s take y^y^y^y^y^…..upto infinity=4. But when u find the value of x and y it’s the same i.e.√2. Therefore, we can easily conclude that 2=4. But it is not possible in reality. So where is the mistake here?????