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I want to show that any subfield of the complex field must contain every rational number.

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    Starting with 1 using addition and subtraction show that you get all integers, and then using division get all rationals2012-08-26
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    @chang Could you add what you have tried? It helps if you "ask" a question: "I want to show that ..." really isn't a question, and it also helps us to know what you've tried, or any ideas you have about how to approach it, etc. I see you have a suggestion in the comment above...can you see where you can get with that?2012-08-26

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