Question

Let A = {3, 5) and B = {7, 11).
Let R = {(a, b): a €A, B € B, a - b is odd}
Show that R is an empty relation from A into B.​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

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Step-by-step explanation:

A={3,5}  B={7,11}

R=(a,b):a∈A,b∈B,a−b is odd.

Let B=7,a=3

b−a=4, which is even.

Each element of B is odd & A also has odd elements.

Hence a−b is never be odd, it will always negetive even no.

Hence R=(a,b)∈ϕ.