Question

set notation

Answer 1

help writing \[-1\le x \le 17\]
into set notation

I thought it can be written out as
\[x \left\{ x| -1 \le x \le 17 \right\}\]

or
\[x \left\{x| x \epsilon \mathbb{Z}, -1 \le x \le 17\right\}\]

Answer 2

ignore the x outside of the {}

Answer 3

what does x have to be an integer ?

Answer 4

I suppose I can use REAL instead of Z

Answer 5

\[\Large\mathbb R\]

Answer 6

the second notatuion is better and u can read it like this :-
... is a set such that x in ( Z or R w.e ) s.t ( condition )
sounds perfect :)

Answer 7

then the interval would be
\[[-1, 17] \]

Answer 8

right :)

Answer 9

is there a difference between the use of < > instead of ( )
my Russian professor kept using her brackets as < >

Answer 10

yes there is difference <> is use to define a vector

Answer 11

() is use to define a set/group

Answer 12

() used also for a point

Answer 13

I understood vector as magnitude and direction
<1, 20> is not a vector I assume
unless 1 î, 20 j

Answer 14

it is a vector LAUGHING OUT LOUD never mind

Answer 15

yess its define a vector :)
if u have <1, 20> then its = î + 20 j
u dnt have to put i,j in <>

Answer 16

thank you, people
my brain is in fart mode right now... I need some rest

Answer 17

haha its ok :) YW :)