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If $A_i = \{-i, \dots , -2, -1, 0, 1, 2, \dots , i \}$ then $\cup_{i=1}^\infty A_i$ is

  1. Z
  2. Q
  3. R
  4. C
in Discrete Mathematics by
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4 Answers

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Option: A
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Option A
Set of Integers  i.e. Z 

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A (All Ineteger)
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Option (A) - as this is the union of all Integers from -$\infty$ to +$\infty$

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