Consider the following three sets.

  • A={x:0<x<20}A = \{ x: 0 < x <20\}
  • B={x:x is an even integer}B = \{ x: x \text{ is an even integer}\}
  • C={x2:x is an integer}C = \{ x^2: x \text{ is an integer}\}

What is the intersection of A,B,CA, B, C?

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