4. Which of the following are subspaces of F(-x, )? (a) All functions f in F(-x, x) for which f(0) = 0. (b) All functions f in F(-x, x) for which f(0) = 1. (c) All functions f in F(-x, x) for which...

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Extracted text: 4. Which of the following are subspaces of F(-x, )? (a) All functions f in F(-x, x) for which f(0) = 0. (b) All functions f in F(-x, x) for which f(0) = 1. (c) All functions f in F(-x, x) for which f(-x) = f(x). (d) All polynomials of degree 2.