Question

Find each union or intersection. Let A = {1,3,4}, B = {x|x is an even whole number less than 9}, C = {2,5,7,10} and D = {x|x is an odd whole number less than 10}.

1. C U D

2. A (upside down U) D

Answer 1

so
\(\large\tt \begin{align} \color{black}{
A=\{ 1,3,4 \}\hspace{.33em}\\~\\
B=\{x|\text{x is an even whole number less than 9}\}\hspace{.33em}\\~\\
B=\{0,2,4,6,8\}\hspace{.33em}\\~\\
C = \{2,5,7,10\}\hspace{.33em}\\~\\
D = \{x|\text{x is an odd whole number less than 10}\}\hspace{.33em}\\~\\
D = \{1,3,5,7,9\}\hspace{.33em}\\~\\
}\end{align}\)

see if it makes sense

Answer 2

i gothca

Answer 3

so what is
\(\large\tt \begin{align} \color{black}{
C\cup D\hspace{.33em}\\~\\
}\end{align}\)

Answer 4

i don't know what the sign means exactly

Answer 5

it means all values of \(C\) and \(D\)

Answer 6

{1,2,3,5,7,9,10} ?

Answer 7

\(\Huge \checkmark\)

Answer 8

Thanks ! What about #2 ?

Answer 9

\(\large\tt \begin{align} \color{black}{
A\cap D
\hspace{.33em}\\~\\
}\end{align}\)
means only values which are in both \(A\) and \(D\)

Answer 10

{1,3} ?

Answer 11

\(\Huge \checkmark\)

Answer 12

THANK YOU !!!