Brandon Sembera posted Jan 22, 2023 10:47 PM
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Having browsed online, I’ve seen ads for Amazon, Ford, and Newegg. Some online retailers that I’ve purchased from are Amazon, Walmart, and Lowe’s. Therefore:
A = {Amazon, Ford, Newegg}
B = {Amazon, Walmart, Lowe’s}
Cardinality of set A: n(A)=3, therefore m=3
Cardinality of set B: n(B)=3, therefore n=3
First & last elements of set A: a[1]=Amazon, & a[3]=Newegg
First & last elements of set B: b[1]=Amazon & b[3]=Lowe’s
A trace table illustrates how both sets are related:
Set A
1
2
3
Set B
1
1
1
found
yes
no
no
answer
A⊆B
A⊄B
A⊄B
The table illustrates a portion of the trace, where one intersection exists: Amazon. Otherwise, if the trace continues, no other intersections can be found. Overall, set A cannot be a subset of set B due to sharing only one element with each other.
Jay Wilt posted Jan 21, 2023 8:17 PM
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Hello Everyone,
1.
Set A: Xfinity-NY Times, USAA-I Heart eating, The Nature Conservatory-PC Gamer
Set B: Target, Amazon, Walmart, Food Lion
2.
m= 3
n= 4
a[1]=Xfinity
a[m]=The Nature Conservatory
b[1]=Target
b[n]=Food Lion
3.
I
1
2
3
J
1
2
3
4
Found
No
No
No
No
No
No
No
4.
My algorithm shows that A ⊈ B. They are completely unrelated in every aspect somehow. This is a nightmare and I hope I have done this right.
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