Final answer:
When adding a third plane to two unique parallel planes, the solution set can have infinite solutions, form a line, have a unique solution, or have no solution.
Explanation:
When introducing a third plane to two unique parallel planes, the possibilities for the solution set can vary:
- infinite solutions on a plane: if the third plane is parallel to the other two
- infinite solutions along a line: when the third plane intersects both of the given planes
- one unique solution: if the third plane is exactly the same as one of the given planes
- no solution: in cases where the orientation of the third plane does not allow for intersection with the other two planes
Learn more about plane intersection here:
https://brainly.com/question/118569