Sean las funciones :
f = {(3, 2), ( - 2, 4), (1, 7), (4, - 1)}
g = {( - 1, 3), (2, 2), ( - 2, 3), (1, 4) }
Dominio de f : Df = { 3, - 2, 1, 4 }
Dominio de g : Dg = { - 1, 2, - 2, 1 }
Por lo tanto : Df∩Dg = { - 2, 1 }
a)f + g :
f + g = { ( - 2, (4 + 3)) , (1, (7 + 4)) }
f + g = { ( - 2, 7) , (1, 11) }
b) f - g :
f - g = { ( - 2, (4 - 3)) , (1, (7 - 4)) }
f - g = { ( - 2, 1) , (1, 3) }
c) f * g :
f * g = { ( - 2, (4 * 3)) , (1, (7 * 4)) }
f * g = { ( - 2, 12) , (1, 28) }
d) f / g :
f / g = { ( - 2, (4 / 3)) , (1, (7 / 4)) }
f / g = { ( - 2, 4 / 3) , (1, 7 / 4) }.