Question

Simplify the following unions and intersections of intervals.

Answer 1

\[\eta \cup \mathbb{R}\]

Answer 2

The N stands for a set of all natural numbers.

Answer 3

The R stands for a set of all real numbers.

Answer 4

what does
\[\eta\] stand for?

Answer 5

oh maybe
\[\mathbb N \cap \mathbb R\]

Answer 6

Yes it shows it like that except the U is facing up? And how did you post them like that i was looking for them.

Answer 7

\[\mathbb N \cap \mathbb R=\mathbb N\] since the natural numbers live inside the real numbers and
\[\mathbb N \cup \mathbb R=\mathbb R\] for the same reason

Answer 8

\mathbb N

Answer 9

Oh thanks and sorry i am sorta new to this site so don't know exactly how to post stuff correctly.

Answer 10

I have 2 more problems like this one sec.

Answer 11

that is ok, easier just to describe
the symbol pallet is only good for some things. i was showing off in latex

Answer 12

Oh what is latex? And how do i post and upside down unison like you did?

Answer 13

Hey satellite how do you post an upside down unison?

Answer 14

\cup

Answer 15

\cap

Answer 16

if you want to see any code, right click and it will show up. you can also copy and paste

Answer 17

\[A^c\cap B^c=(A\cup B)^c\]

Answer 18

Oh do i just click show format or what?\[\left[ 2,\infty)\cap(-4,7)\cap(-3,2 \right]\]

Answer 19

this is my next problem ^

Answer 20

so you are looking for what is in common to all three intervals. easy if you drew them

Answer 21

I think so yes...