a)
{ 1, 3, 5, 7 } ∪ { 0, 2, 3, 5 } = { 0, 1, 2, 3, 5, 7 }
b)
{ a, b, c, d } \ { b, c, d, e } = { a }
c)
{ 3, 7, 12, 8, 15 } ∩ { 10, 15, 7, 8, 12 } = { 7, 8, 12, 15 }
d)
{ a, t, d } ∪ { a, d, e } = { a, k, t, d, c, e } \ { c, k }
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a)
{ 1, 3, 5, 7 } ∪ { 0, 2, 3, 5 } = { 0, 1, 2, 3, 5, 7 }
b)
{ a, b, c, d } \ { b, c, d, e } = { a }
c)
{ 3, 7, 12, 8, 15 } ∩ { 10, 15, 7, 8, 12 } = { 7, 8, 12, 15 }
d)
{ a, t, d } ∪ { a, d, e } = { a, k, t, d, c, e } \ { c, k }