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Mathematics
Mathematics
Problem
Show that
n
(
A
∪
B
)
≤
n
(
A
)
+
n
(
B
)
n(A \cup B) \le n(A) + n(B)
n
(
A
∪
B
)
≤
n
(
A
)
+
n
(
B
)
.
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