3. Find the tangent line to the graph of x2(x2 + x2)=y2 at the point\( \left( \frac{\sqrt{2}}{2}, \frac{\sqrt{2}}{2} \right) \).
3. Find the tangent line to the graph of x2(x2 + x2)=y2 at the point\( \left( \frac{\sqrt{2}}{2}, \frac{\sqrt{2}}{2} \right) \).