Datasets:
NationalTutoringObservatory
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MathEd-PII

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volunteer
OK
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volunteer
let's try this
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volunteer
what is f(-1) (not the invers but f)
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student
1/2
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volunteer
yes and what is 1/2) ?
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student
1/2
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volunteer
good
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student
so its even
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volunteer
now have you heard of the horiz line test?
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student
yes
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volunteer
see if the domain included both -1 and 1 we could not really have an inverse!
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student
yea
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volunteer
Maybe that helps with the domain?
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student
yea
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student
i mean
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student
i can upload what the textbook says the answer is
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volunteer
OK pls do
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student
but that book is also notorious for being wrong
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volunteer
Ohhhh OK
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volunteer
well I have lots of experince so we will see
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volunteer
wow it is confusing let me think
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student
i see that they plugged inverse into the original
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student
i guess its to see if they get x
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volunteer
OK yes that is to show that they are mutual inverses
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volunteer
we did not get to the yet
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student
what does mutual inverses mean?
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student
that they are inverses of eachother?
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volunteer
I think it means that if you take the inverse of the invers you get back to where you started
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volunteer
yes
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student
ohh ok
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volunteer
btw I look at my kbd a lot so sometimes I miss your msg for a minute or so
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volunteer
I will cirlce
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volunteer
on the bd
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volunteer
There they are plugging in our "new" y for the old x
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student
yea
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student
so theyre just trying to pretty much say
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student
that these functions are equal to eachother in the given domain?
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student
well not equal
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volunteer
not exactly
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student
i mean inverses
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volunteer
but they are showing that if you take the inverse of the inverse you get back to x
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volunteer
Yes
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volunteer
Also I will circle
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volunteer
They can I *think* take abs vlaue becuase of the domain
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volunteer
Otherwise they might need to say plus or minu x
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student
ohhhh
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volunteer
where I circled in blue
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student
ok that makes sense
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volunteer
good
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volunteer
IMHO this ques is a bit confusing
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student
it is
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student
but then again thats ib for you
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volunteer
ib ?
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student
international baccalaureate program
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volunteer
OK I see Ok
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volunteer
Do they tend to be confusing?
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student
VERY
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student
and our teacher has never taught the class before, and our previous teacher that taught for 40 years just retired last year
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volunteer
I see
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volunteer
well mayb the questions make morfe sense to studentds in London
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[ { "pii_type": "LOCATION", "surrogate": "London", "start": 57, "end": 63 } ]
volunteer
LOL
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student
i mean i guess
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student
theres just not many good resources for the class
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volunteer
I see
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volunteer
well pls be kind to you tchr
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student
and im not very good at math in the first place
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volunteer
Teaching a new course is a challneg
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student
i am, i know she's trying
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volunteer
good :)
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volunteer
and you have Sarah too
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[ { "pii_type": "PERSON", "surrogate": "Sarah", "start": 13, "end": 18 } ]
student
yea ive been on here for like 2 hours a day for the past month
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volunteer
ohhh I see
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volunteer
OK do u have another ques now?
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student
nope, that was it
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student
i finished all other questions in the review chapter
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student
thanks for helping!
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volunteer
You are welcome
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volunteer
u seem to catch on quickly
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student
i do
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volunteer
Hope to "see" you again. BYE BYE
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student
hey
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student
how would i solve this?
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student
because
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volunteer
normally these kinds of problems would have 2 cases but this one has 4 because both sides are abs value
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student
i get x<= 1/3
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student
but i get x<=-3 instead of x>=-3
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volunteer
ok let me work it out quickly and ill take a look
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student
ok
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volunteer
or do you want to write your work on the board and i can tell you where you went wrong
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volunteer
i think that would be more productive
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student
that's what i did
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volunteer
hmm that should work
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student
i feel like i must have missed a step to flip the sign
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student
because after checking my work i found that x is supposed to be >=-3
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volunteer
oh i see what it is
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volunteer
this is an extraneous solution
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volunteer
if you plug in -3, all is good. however, if you plug in another value that is less than -3, say -4, the equation is no longer satisfied
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volunteer
i'll write it on the board
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student
oh but
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student
how would i know its supposed to be greater than -3 instead?
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