Answer to Question #199741 in Discrete Mathematics for Ryan

Question #199741

Consider the following relation on set B = {a, b, {a}, {b}, {a, b}}: P = {(a, b), (b, {a, b}), ({a, b}, a), ({b}, a), (a, {a})}. 

Which one of the following alternatives represents the range of P (ran(P))?

1. {a, b, {a}, {a, b}}

2. {a, b, {a}, {b}, {a, b}}

3. {a, b, {b}, {a, b}}

4. {a, b, {a, b}}



1
Expert's answer
2021-05-30T23:45:01-0400

Solution:

Given, P = {(a, b), (b, {a, b}), ({a, b}, a), ({b}, a), (a, {a})}. 

For any set A = {(x,y)}, range of A = {y}

So, ran(P)=range of P = {b,{a,b},a,{a}} = {a, b, {a}, {a, b}}

Hence, option 1 is correct.


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