Question: Please help me on proving this question! Step by step explanation would be great. Thanks! 2.5.52. Let F Q IR be a subset, which is

Please help me on proving this question! Step by step explanation would be great. Thanks!

2.5.52. Let F Q IR be a subset, which is also a eld (with the usual addition and multiplication inherited from R). We say that F is a subeld of IR. (a) Explain why the numbers 3, 4, % and % must be elements of F, while \\/ and 71' need not be in F. (b) Prove that Q Q F

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