Question

Given the following sets.

A = {0, 1, 2, 3}
B = {a, b, c, d}
C = {0, a, 2, b}

Find A u B

{0, 1, 2, 3}
{a, b, c, d}
{0, a, 2, b}
empty set
{0, a}

Answer 1

i cant find the answere:(

Answer 2

help

Answer 3

not 100% sure but think it empty set