Sets
2 marks · EasyIf the universal set U = \{1, 2, 3, 4, 5\} and A = \{2, 3\}, write down the elements of A'.
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\{1, 4, 5\}
Also accept: {1, 4, 5}
Common mistakes: {2, 3}
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Marking points
M1 · 1 mark · Finds the elements not in A.
A1 · 1 mark · Gives the answer as {1, 4, 5} using curly brackets.
Worked solution
A' is the set of all elements in U not in A: {1, 4, 5}