Question: 2. For r E (0, co), let Ar = [-*, r). Define the collection A = {A, : re (0,co)). Prove that (a) UPE(0,20) Ar

2. For r E (0, co), let Ar = [-*, r). Define the
2. For r E (0, co), let Ar = [-*, r). Define the collection A = {A, : re (0,co)). Prove that (a) UPE(0,20) Ar = [-7, 00) (b) OrE(0,29) Ar = [-*,0)

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