Question: I need help with part B. I do not understand how to answer it. Let W be the union of the first and third quadrants

I need help with part B. I do not understand how to answer it.

Let W be the union of the first and third quadrants in the xy-plane. That is, let W= | |: xy 20. . Complete parts a and b below. a. If u is in W and c is any scalar, is cu in W? Why? If u =

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