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**1. Simplify the derivative**

**2. [itex] y = \frac{\sqrt{1-x^{2}}}{x}[/itex]**

**3. [itex] f'(x) = \frac{x*\frac{-2x}{2\sqrt{1-x^{2}}}-\sqrt{1-x^{2}}}{x^{2}}=\frac{-x^{2}-\sqrt{1-x^{2}}}{x^{2}\sqrt{1-x^{2}}}[/itex] I just don't know how to simplify this further.**