Question

(1) PUR
Is PU Q a proper superset of Pn
5.
If
A
=
{
letters
of
word
INTEGRITY
}
and
B
=
{
letters
of
word
RECKONING
,
(iv) B-A
Also verify that:
(a) n(A U B) = n(A) + n(B) - n(A n B)
(b) n(A - B) = n(A U B) – n(B) = n(A) - n(
AB)
(C) n(B - A) = n(A U B) – n(A) = n(B) - n(A n B)
(d) n(A U B) = n(A - B) + n(B - A) + n(A n B).​

Answer 1

Answer:

..\_(ツ)_/¯. ¯\(◉‿◉)/¯..............

Answer 2

i didn't know about this