Question: Describe the values of x and y for which (a) |x + y| = |x| + |y| (b) |x y| = |x| + |y|.

Describe the values of x and y for which 

(a) |x + y| = |x| + |y|
(b) |x − y| = |x| + |y|.

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a For the equation x y x y there are four possible cases to consider Case 1 x 0 and y 0 In this case ... View full answer

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