17 Evaluate (in simplest form)
$$
\sqrt{2008+2007 \sqrt{2008+2007 \sqrt{2008+2007 \sqrt{\ldots}}}}
$$
17. Answer: 2008 positive. Now $x^{2}=2008+2007 x \Rightarrow(x-2008)(x+1)=0$. Hence the only solution is $x=2008$.