Question

what does relation in math mean? I don't understand

Answer 1

@terenzreignz @Callisto @Yahoo!

Answer 2

Relation is a subset of A X B

Answer 3

and what is A and B?

Answer 4

A and B are any two sets

Answer 5

A= { 1 , 2 , 3 ,4 } B = { 5 , 6 , 7 , 8}

Answer 6

okay so if they say: discuss the domain and range of each relation whose defining rule is: y=3x+1 what do they mean?

Answer 7

Domian is wat we give and Range is wat we get

Answer 8

i know, domain is inputs and range is outputs..

Answer 9

Say the relation is from set A to B.
The domain is the set of all elements in A that are related to some element in B.
The range is the set of all elements in B that some element in A is related to :)

Answer 10

Give me some EG: i will show u

Answer 11

i did:
discuss the domain and range of each relation whose defining rule is: y=3x+1 what do they mean?

Answer 12

Domain is wat we give For this eq 3x + 1

Answer 13

we can give any values for x

Answer 14

becoz there is no condition such as sqrt ,, or rational function

Answer 15

oh okay :) thx ^^ so i just need to find the range and domain for whatever equation they give me?

Answer 16

values of x and y which apply..

Answer 17

yes

Answer 18

thank you so if i am given an inequality: \[\left\{\begin{matrix}
2x+y<1\\ x>1

\end{matrix}\right.\]

Answer 19

how would i find the y values? @Yahoo!

Answer 20

plug in values for x .... x>1 and see

Answer 21

x=2 then y < -3

Answer 22

so wat u can get frm this

Answer 23

this is the answer in the book: \[\begin{Bmatrix}
y\mid y<1
\end{Bmatrix}\]

Answer 24

4 + y <1 y = -4, -5 , -6................

Answer 25

but how come the books answer y can be 0,-1.....

Answer 26

just a min

Answer 27

x> 1 take 1.1

Answer 28

2.2 + y <1 y = -2.2 ,........

Answer 29

okay, sorry but i still don't understand..thank you for the help though :) i'll just ask my teacher later

Answer 30

i am sorry....i was not able to expl this clearly to u

Answer 31

just a min i will call some other persons

Answer 32

@shubhamsrg

Answer 33

@experimentX

Answer 34

thank you for the help @Yahoo! , @waterineyes can you help please?

Answer 35

In finding that inequality ??

Answer 36

i don't know, I still don't understand what a relation is..

Answer 37

My concepts on defining a relation are relation are also weak..

Answer 38

oh okay, thank you for trying :)

Answer 39

@ujjwal @amistre64 @supercrazy92

Answer 40

Do you know about sets ??

Answer 41

yes

Answer 42

You still here? I got real tired last time, I'm sorry...
Maybe we can work backwards, do you know what a function is?