Question: X 1. For each k c N let Ax be a countable set. Show that U Ak k=1 is countable. In other words, a Crop

X 1. For each k c N let Ax be a

countable set. Show that U Ak k=1 is countable. In other words,

X 1. For each k c N let Ax be a countable set. Show that U Ak k=1 is countable. In other words, a Crop one question at a time ets is countable

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