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Mathematics 21 Online
OpenStudy (anonymous):

question inside :) will be attached... same with answer choices :)

OpenStudy (anonymous):

PROBLEM!!! :)

OpenStudy (anonymous):

answer choices A,B,C,D from top to bottom :)

OpenStudy (sirm3d):

third from top

OpenStudy (anonymous):

can u pls explain? :) and which one do u mean?? A,B,C,or D??

jimthompson5910 (jim_thompson5910):

the first 3 have something in common (look at the degrees of the denominator)

hartnn (hartnn):

know what domain is ?

OpenStudy (anonymous):

idk really :( can y'all please exlapin?? :) and idk what they have in common :(

jimthompson5910 (jim_thompson5910):

they have exponents of ___

OpenStudy (anonymous):

2?

jimthompson5910 (jim_thompson5910):

since they all involve subtraction, this means that that each of the first 3 have 2 vertical asymptotes

jimthompson5910 (jim_thompson5910):

but what's given is just one vertical asymptote

OpenStudy (anonymous):

okay but what does that mean?

OpenStudy (anonymous):

my answer is D?

OpenStudy (anonymous):

since the other 3 have 2 vertical asymptotes?

jimthompson5910 (jim_thompson5910):

it says that there is exactly 1 vert asymptote, but the first 3 have 2 vert asymptotes, so the first 3 must be ruled out because of this discrepancy

OpenStudy (anonymous):

kk so my answer is D?? the one i attached??

jimthompson5910 (jim_thompson5910):

yes

hartnn (hartnn):

it may be possible that one of the 2 vertical asymptotes are given, its not written that ' there is exactly 1 vert asymptote'

OpenStudy (anonymous):

okay thanks!! :) ahha :)

hartnn (hartnn):

plus domain does not contain -3 , but domain of 4th contains -3

jimthompson5910 (jim_thompson5910):

true, i guess the domain paints a more definitive picture

jimthompson5910 (jim_thompson5910):

oh didn't even see the +-...my bad lol

hartnn (hartnn):

so looking at the domain, which does not contain +3 or -3, the denominator will be x^2-9

OpenStudy (anonymous):

so my answer is C?

hartnn (hartnn):

finally, yes!

OpenStudy (anonymous):

haha kkk thanks :)

hartnn (hartnn):

haha kkk welcome :)

OpenStudy (anonymous):

:)

OpenStudy (sirm3d):

i agree with @hartnn

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