1.

Let R = {(a, b): a, b ∈ N and b = a + 5, a < 4}. Find the domain and range of R.

Answer»

By substituting values we get

R = {(1, 6), (2, 7), (3, 8)}

So we get

dom (R) = {1, 2, 3}

range (R) = {6, 7, 8}



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