Answer :
Given that,
f = {(1, 2), (3, 5), (4, 1) and g = {(2, 3), (5, 1), (1, 3)}
Now,
gof (1) = g(f(1)) = g(2) = 3
gof (3) = g(f(3)) = g(5) = 1
gof (4) = g(f(4)) = g(1) = 3
∴ gof = {(1,3),(3,1),(4,3)}
fog (2) = f(g(2)) = f(3) = 5
fog (5) = f(g(5)) = f(1) = 2
fog (1) = f(g(1)) = f(3) = 5
∴ fog = {(2,5),(5,2),(1,5)}
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