Question

f(x)=-2/x^2+2x-3

Determine the domain of the function

Answer 1

domain is negative infinity to infinity but there should be some vertical asymptotes in there so it is not continuously from negative infinity to infinity. gimme a sec

Answer 2

x cannot be 0

Answer 3

no dumbcow, x cannot be -3 or 1

Answer 4

domain should be x not equal to -1 or -3 i.e R-{-1,-3}

Answer 5

oh whoa nevermind didnt see the negative sign in front of the 2

Answer 6

and R here is the set of real numbers:)

Answer 7

got it?

Answer 8

x cannot be 0 thats it so all real numbers except when x is 0

Answer 9

I'm trying. lol. Thank you for explaining; I sure do appreciate it. Got tons of this stuff to help someone else out.

Answer 10

it doesnt make sense even if x=0 as there is a '-3' in th e denominator ...lol

Answer 11

this is unbelievable i must be drunk final answer is all real numbers except when x equals to 1 or -3

Answer 12

All numbers except wen x=-1 or -3....

Answer 13

of course x can equal to 0!!!!!!

Answer 14

no its 1 or -3 not -1 or -3

Answer 15

haha sorry you guys didnt read the problem correctly

Answer 16

yes it can be =0

Answer 17

yep

Answer 18

@dumbcow haha i hadnt the first time around either

Answer 19

now did u get it??

Answer 20

hello anybody there??

Answer 21

yes

Answer 22

so u got what i typed above?

Answer 23

Okay, so the domain is not (-inf, inf).....

Answer 24

no its not

Answer 25

So it's all real numbers except when x=0

Answer 26

no...its all real nos. except wen x=-1 or x=-3

Answer 27

now , is it alright?

Answer 28

Yes, thank you

Answer 29

you're welcome @JJ

Answer 30

So, if I had [f(x)=\sqrt{5-x}\] , would that mean, the Domain would be all real numbers? Just making sure I got that one right.I'm assuming this because I can plug anything in there.

Answer 31

no x cannot equal any negative number in that caase

Answer 32

u can plug anything there except the number/numbers that make the denominator go '0'

Answer 33

and yeah , sqrt can't be negative so u have to remeber that:) so domain wud be numbers<5

Answer 34

So, all real number <5

Answer 35

thinker i think youre a bit confused. x can equal indeed to 5, that would just mean y equals 0. The domain is R = (0,infinity)

Answer 36

I sure am confused. So sorry.

Answer 37

JJSONFIRE i am really off it today listen to thinker im wrong

Answer 38

Hey, trust me I understand.

Answer 39

yep youre right

Answer 40

hey ....if its(),infinity) that wud make the sqrt tern negative which is not Real!!

Answer 41

i know you do im admitting that im wrong. im tired but still willing to help

Answer 42

i just explained to you that i made a mistake

Answer 43

ive been working all day..... :/

Answer 44

yeah..thats ok...im tired too...nevermind

Answer 45

Do you think you guys could help me with one more..please

Answer 46

sure

Answer 47

This set of problems says I need to determine if "f" is defind by f(x)=2x^2+5. The problems are f(-2)............next is f(3x)............last is -f(x)............Please, explain the best you can ...i'm lost..the book is useless with explanations

Answer 48

just plug in -2 in the first one as it says "f(-2)"...in place of x & u will get the answer:) its simple:)

Answer 49

Wow, so i was right. Woohoo..

Answer 50

and similarly for the rest...if it says f(3x) then plug in '3x' in place of 'x'

got it?

Answer 51

ohh u were..?? good:)

Answer 52

now i gotta go...bye...hope i helped u:)

Answer 53

i've been at this all night...not sure whats been right and whats been wrong.

Answer 54

ohh..dont worry thats how u learn, right?

Answer 55

ACtually, the one with the negative f...not so sure actually

Answer 56

hmm..np...bye for now:)

Answer 57

-f(x)....how in the world...Is it as simple as just writing that out?

Answer 58

hmmm yupp:)

Answer 59

Thank you sooooooooooo much.

Answer 60

ohhhhh:):) youre welcome:) hope i help u next time too:)

Answer 61

Oh, I have 2 more sets to finish that are different...need to finish them today. I am helping someone who seriously needs the help that will never use this stuff, so i'lm trying my very best to help them. Its very important it gets done right you know.

Answer 62

hmm yeah...but i am really tired:(:( sry:(:( gotta go...next time..

Answer 63

Thank you. Nite.

Answer 64

gud nite:):) n byee