Last week, I asked what 0, 1 and ∞ have in common. The answer is that if you raise them to any positive power, their value does not change. For example 0 squared is 0, 1 squared is 1, ∞ squared is infinity. Similarly, any root of them does not change their value, so the square root of 0 is 0, of 1 is 1 and of infinity is infinity.
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