Question: 4. [5 pts] The point (1,2,1) lies on the intersection of the two surfaces dened by the equations 13:: y2 = *2 and x2 +y2
![4. [5 pts] The point (1,2,1) lies on the intersection of](https://s3.amazonaws.com/si.experts.images/answers/2024/06/666697c711369_558666697c6f1273.jpg)

4. [5 pts] The point (1,2,1) lies on the intersection of the two surfaces dened by the equations 13:: y2 = *2 and x2 +y2 = :2 +4. Find the angle between these two surfaces at the point (1, 2,1)
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