Unformatted text preview: . #4. (Problem #4 on p. 23.) Let E be a nonempty subset of an ordered set; suppose is a lower bound of E and is an upper bound of E . Prove that . #5. Represent the complex numbers z 1 = 1 + i 1i and z 2 = 4 + 3 i 3 + 4 i in the algebraic form z = a + bi with a,b R ....
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 Fall '09
 Sets, Algebraic number, sup B.

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