Exercise 15 Absolute value 1. If x is a positive real number show that for some & > 0, yER and x - y 0.
Exercise 15 Absolute value 1. If x is a positive real number show that for some & > 0, yER and x - y 0. 2. If x, z E R show that for each E > 0 there is some 8 > 0 such that if y E R satisfies ly - x|
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