Question

Given the following sets.

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

Find A upside down u B.
{0, 1, 2, 3}
{a, b, c, d}
{0, a, 2, b}
empty set
{0, a}

Answer 1

need help

Answer 2

@tiny0987