Unusual Infinite nested radicals

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Find the value of this infinitely nested radical in terms of a. Is this even possible?

Edit: I believe that I have already solved it, though I would like confirmation that my work is correct. Here is my work for this question: solution in question

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Hint: Taking a^2 common you will get $a^2\sqrt{1+√1+√1+√1+√1+...}$

Let y=$\sqrt{1+√1+√1+√1+√1+...}$

So,y=$\sqrt{1+y}$

Solve for y by squaring both sides