Question

Suppose A = {2, 5, 7, 9, 13, 25, 26}.

(a) Find n(A).
n(A) =

(b) T/F: 20 A
True
False

Answer 1

Part (a)

Answer: 7

Reason:

There are 7 items inside set A. The notation n(A) counts the number of elements in a set.

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Part (b)

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