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If U = (1, 2, 3, 6, 7, 8, 9, 10) is the universal set....

Mathematics
JAMB 1992

If U = (1, 2, 3, 6, 7, 8, 9, 10) is the universal set. E = (10, 4, 6, 8, 10) and F = {x: 1x\(^2\) = 2\(^6\), x is odd}. Find (E ∩ F)', where ' means the complement of a set.

  • A. (0)
  • B. U
  • C. (8)
  • D. \(\phi\)
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Correct Answer: Option B
Explanation

U = (1, 2, 3, 6, 7, 8, 9, 10)

E = (10, 4, 6, 8, 10)

F = (x : x\(^2\) = 2\(^6\), x is odd)

∴ F = \(\phi\) Since x\(^2\) = 2\(^6\) = 64

x = \(\pm 8\) which is even

∴ E ∩ F = \(\phi\) Since there are no common elements

Since E ∩ F =  \(\phi\), then ( E ∩ F)' = U = (1, 2, 3, 6, 7, 8, 9, 10)


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