Question

discrete math question

Answer 1

\[A= \left\{ n \in N: n \le20 \right\}\]

Answer 2

then determine the following set
\[\left\{ n \in A : n | 4\right\}\]

Answer 3

I'm having trouble figuring out the vertical line between n & 4

Answer 4

so we want the numbers in the set\( \{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20\}\) that divide 4

Answer 5

that's it?

Answer 6

I feel dumb, I just couldn't find what that line meant!

Answer 7

lol its not so obvious....

Answer 8

could you help me with another part of that same question?

Answer 9

sure

Answer 10

A is the same
\[\left\{ n \in A : \max \left\{ n,14 \right\} =n\right\}\]

Answer 11

I had thought it was 1-14

Answer 12

I mean 0-14

Answer 13

so you want all the numbers from the set above such that the max of them and 14 is the number

max{1,14}=14
max{2,14}=14
.
.
.max{14,14}=14
max[15,14} = 15

so {14,15,16,17,18,19,20}

Answer 14

you got it backwards

Answer 15

ah!

Answer 16

14-20 then

Answer 17

correct

Answer 18

alright, thanks!

Answer 19

np