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Determine Whether the Set Is fiNite or Infinite {x∣x∈N and 9x2−1=0}\left\{ x \mid x \in \mathbf { N } \text { and } 9 x ^ { 2 } - 1 = 0 \right\}

Question 19

Short Answer

determine whether the set is finite or infinite. If the set is finite, find its size.
- {x∣x∈N and 9x2−1=0}\left\{ x \mid x \in \mathbf { N } \text { and } 9 x ^ { 2 } - 1 = 0 \right\}

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