Exercises 1–4 display sets in . Assume the sets include
Chapter 2, Problem 3E(choose chapter or problem)
Problem 3E
Exercises 1–4 display sets in . Assume the sets include the bounding lines. In each case, give a specific reason why the set H is not a subspace of . (For instance, find two vectors in H whose sum is not in H, or find a vector in H with a scalar multiple that is not in H. Draw a picture.)
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