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Math 112 Review - Shared screen with speaker view
Zachary Nielsen
01:16:41
wait
Zachary Nielsen
01:16:58
when did this start?
Melissa Mangelson
01:17:11
like 1 min ago!
Neil Loosli
01:17:12
Like 2 minutes ago
Zachary Nielsen
01:17:33
Lol its not even 5 yet
Ignacio R. de Almeida
01:23:19
Is this recording going to be in math.byu.edu? If so, when do you guys think it will be posted? Thanks!
Lauren King
01:23:44
where r these reviews from?
Alex Cherry
01:23:54
^
Jonas Nielsen
01:23:55
^
Ella Hayes
01:24:12
I think theyre on the math lab website under practice tests
Emma Anderson
01:26:26
I thought that as x approaches infinity is not on this exam yet?
McKenna
01:26:34
same
Aileen Arriagada
01:26:36
same
Tyler Driggs
01:26:42
I don't think it is
Brayden
01:26:58
I don't believe it is as we are going over it on Wednesday
Zoë Bell
01:27:04
What was the answer for number 9 that she just did?
Nathaniel Judd
01:27:11
-1/5
Emma Anderson
01:27:11
Awesome thanks
Sean Baird
01:27:12
-2/3
Nathaniel Judd
01:27:16
oops
Sean Baird
01:27:17
for 9
Nathaniel Judd
01:27:19
I thought you meant this one
Nathaniel Judd
01:27:20
sorry
Ignacio R. de Almeida
01:27:21
This exams reviews have topics that we haven’t taken since there used to be 3 mid term and now are 4 (or something like that)
Ignacio R. de Almeida
01:27:31
These*
Zoë Bell
01:27:50
All good thank youuu
Lucy Murff
01:29:31
Is there a pdf link to this document?
Sam Baesler
01:30:00
Heres one link:
Sam Baesler
01:30:01
https://math.byu.edu/wp-content/uploads/2017/03/M112F16E1-sample-1.pdf
Maren C
01:30:56
Thanks Sam !
Ignacio R. de Almeida
01:31:18
Is this recording going to be in math.byu.edu? If so, when do you guys think it will be posted? Thanks!
Jenney Kim
01:31:26
math.byu.edu
Spencer Bartholomew
01:31:29
math.byu.edu
Daira Velasco
01:31:29
https://math.byu.edu/?page_id=193
Dallin Bowie
01:31:30
https://math.byu.edu/?page_id=193
Nathaniel Judd
01:31:30
Just type math.byu.edu
Jenney Kim
01:31:36
then go to undergraduate tab
Nathaniel Judd
01:31:36
it's there in the top of her screen
Alex Cherry
01:31:37
There was also a link on the email sent out
Jenney Kim
01:31:39
scroll to the bottom
Sydney Cluff
01:32:03
Robbie put all the links in an announcement for the course
eric
01:35:02
when does the test open and close again?
Rex
01:35:21
Closes Thursday
Alexander Amrine
01:35:21
Tuesday at 1 AM and Thursday at 11:59PM
Josh Hanosek
01:35:26
opens tomorrow and closes thursday
Josh Hanosek
01:38:59
we have not learned this yet
Briana King
01:39:13
#3
Lilian Tsubaki
01:39:39
could you solve: tan(arcsin(4/5))
Blake Rozsa
01:39:51
you would use a triangle
Blake Rozsa
01:40:08
Then you find the 3rd side and take the tangent of the arcsin triangle
Alexander Amrine
01:40:11
Anyone have good ideas to memorize trig identities?
Grace Worthington
01:41:21
limCan you help solve the lim as x approaches zero from the right of 5arctan(ln(x))
Zachary Nielsen
01:41:41
^
Josh Hanosek
01:41:48
^^
Alexander Amrine
01:43:23
Does anyone know which trig identities we will have to know? Robbie said it wouldn’t be all of them
Victoria Lopez
01:43:25
Going over simplifying sin(2arccos(x)) would be fantastic!
Jonas Nielsen
01:44:05
sin(x+y)
Brierton Sharp
01:44:07
Can you do number 7 on the webassign 9?
Jaden Lay
01:44:35
what about the double angle identities?
Alexander Amrine
01:44:48
^
Troy Hess
01:44:58
^
Lucy Murff
01:45:06
^^
Luke Rainey
01:45:14
https://www.youtube.com/watch?v=I4mcja8abDc
Ryan Jensen
01:45:29
no its 2sinxcosx
Ryan Jensen
01:45:34
oh true
Blake Rozsa
01:45:35
Thanks for the video @Luke
Luke Rainey
01:45:52
Three videos on how to remember/derive the trig identities you’ll need to know
Blake Rozsa
01:47:05
Better safe than sorry?
Summer Scherer
01:47:39
20 multiple choice
Divya Nikitha Kusuluri
01:48:07
Can you go over the question 1? Only how to find the domain?
Divya Nikitha Kusuluri
01:48:28
in webassign
Sam Baesler
01:49:51
Which web assign was that on?
Divya Nikitha Kusuluri
01:49:54
I mean only range
Nathaniel Judd
01:50:00
yeah I never saw that one
Divya Nikitha Kusuluri
01:50:02
Review question papaer
Javin Gudmundsen
01:50:02
Same, I don’t remember that one
Blake Rozsa
01:50:10
^
Divya Nikitha Kusuluri
01:50:26
WA 9 - Review for Exam 1
Nathaniel Judd
01:50:41
I just finished that one and I never saw that
Divya Nikitha Kusuluri
01:50:48
Question 1, I just need to know how to know the range
Ian Little
01:50:51
qait there is review on web assign?
Ryan Jensen
01:50:51
maybe coach dorff's assignment is different
Divya Nikitha Kusuluri
01:50:59
oh gotcha!
Nathaniel Judd
01:51:01
Probably
Spencer Searcy
01:52:24
pray
Alexander Amrine
01:52:30
^
Jaden Lay
01:52:31
there is a review on webassign for snellman but I don't know if there is one for dorff
Blake Rozsa
01:52:31
^^
Tyler Christensen
01:52:35
personal revelation
Bitner Hayes
01:52:35
lol
Grace Worthington
01:52:36
This problem was from web assign #10 question #7
Divya Nikitha Kusuluri
01:53:15
ok thank you!
Daira Velasco
01:53:28
can we do number 3 of this one please
Alli Cowan
01:53:44
webassign 10 doesn't apply to this exam
Brayden
01:53:51
isn't Web assign #10 and its concepts not on the exam?
Alexandra Mantilla Arrayan
01:53:52
^^
Daira Velasco
01:54:00
nop
Zachary Nielsen
01:54:01
That is correct
Zachary Nielsen
01:54:26
everything up to and including 2.5b is on the exam
Tyler Christensen
01:54:49
was my mic on? I thought I had it off but got a message that someone muted me
Alyssa Tobler
01:54:59
so will this question not be on the test?
Sam Baesler
01:55:07
@Alyssa no
Alyssa Tobler
01:55:21
ok thank you.
Daira Velasco
01:55:28
can you do number 3 please
Jaden Lay
01:55:37
simp for Robbie join the discord for snellman's class https://discord.gg/4V4Ur7
Zachary Nielsen
01:55:43
^^^
Ian Little
01:55:58
so memorize everything
Brierton Sharp
01:56:01
Number 7 on wegassign pls
Darwin Buhler
01:56:02
is this what the actual exam will look like?
Penelope Bowden
01:56:06
Which practice exam are you guys looking at?
Lucy Murff
01:56:14
yes
Lucy Murff
01:56:21
oh
Lucy Murff
01:56:23
nvm
Darwin Buhler
01:56:34
Where do we find this practice exam at?
Ryan Jensen
01:56:43
math.byu.edu
Lucy Murff
01:56:43
https://math.byu.edu/wp-content/uploads/2017/08/Math-112-Fall-2016-Exam-1-sample-1-KEY-1.pdf this one Penelope
Penelope Bowden
01:56:59
Thank youo
Kirsten Hall
01:57:40
would you be able to do webassign #4 the equation is 6cos(x) + 3sin(2x) =0
Alex Cherry
01:58:28
Kirsten what do you solve for in that one
Alex Cherry
01:58:34
Just solutions?
Rex
02:01:07
Where did the 2 come from?
Clara
02:01:31
it was a hypothetical question for if there was a 2 in front of tangent
Morgan Kurth
02:01:50
for the ones on the upper right of the page she is just practicing exponents as a separate problem
Emma Anderson
02:02:35
Could you do 1 from the spring 2017 exam?
Emma Anderson
02:04:56
The domain of (e^(x−2) ln(6 − x))/√(3x-12)
Victoria Lopez
02:05:03
Just double checking, we don't need to be able to calculate limits that approach infinity because we're learning that later?
Blake Rozsa
02:05:12
@Kirsten, there is a trig ID sin2x=2sinxcosx so you do that, factor out the 6cosx and solve for x for each quantity
Jaden Lay
02:05:13
yep
Jaden Lay
02:05:20
that's wednesday
Luke Rainey
02:06:58
(8x^7⁄2 y^5)/(x^6 y^−3⁄2)all to the −2 power
Darwin Buhler
02:07:19
when will the recording be released?
Briana King
02:08:12
could you do #11 on this test?
Lucy Murff
02:09:17
Will we see #6 on the test?
Jacob Ordaz
02:09:56
So far the domain we have to solve the top to?
Lucy Murff
02:10:00
yes
Jacob Ordaz
02:10:23
aight thanks
Lucy Murff
02:10:29
On the fall test
Jared Escobar
02:10:38
Can you do #6 on webassign 10
Harrison
02:11:59
Can we do #18 on this test, while we're on the topic of IVT
Nick York
02:12:06
^^^
Nathan Holmstead
02:12:15
Could you do number 15 on this test?
Clara
02:15:29
what would the domain be of (3x+2)/ sqrt x^2-7x)
Jonathan Mower
02:16:39
good question, *pats you on the back*
Brandon Southwick
02:16:55
(7, infinity) I think @Clara
Clara
02:17:39
they said the answer was (-infin, 0] U [7, infin)
Clara
02:17:41
isn't that weird?
Brandon Southwick
02:18:29
Oh that’s true, but I don’t think 7 or 0 should be included
Lucy Murff
02:19:08
Can we do #8 on the fall 2016 test?
Clara
02:19:32
how is (-infin, 0) included?
Brandon Southwick
02:20:44
Any negative number you plug in will give you a positive number in the denominator, so it is within the domain
Lucy Murff
02:20:49
Wait wouldn’t you do values smaller than three since you’re approaching it from the left?
Leah Leavitt
02:21:15
aye
Jonathan Mower
02:22:18
shut him down Rebecca!
Katriina Jarvis
02:22:34
Whoa play nice guys
Nathaniel Judd
02:22:53
Haha
Beau Wright
02:23:09
You have to know what the graph of 1/x looks like
Clara
02:23:13
@Brandon, how would you solve it? bc when I solve it I get only positive but plugging in negative numbers makes sense
Nathaniel Judd
02:23:21
we only care about the signs in this problem
Lucy Murff
02:23:33
So this would be DNE? Because the limits aren’t the same?
Yong Nan Chang
02:23:36
Could you go over really quick for which questions will not be on the test so I can skip those
Nathaniel Judd
02:23:39
yeah
Lucy Murff
02:23:48
For the limit as it approaches 3
Beau Wright
02:23:59
Never mind you're right
Leah Leavitt
02:24:00
*approaches from the left
Alex Cherry
02:24:02
Exactly. Plug in 2.9, and you get a negative number. Because you know the graph is inf, -inf, or DNE, because you get a negative with a number slightly less than 3 it is -inf
Nathaniel Judd
02:24:47
no vertical asymptotes
Nathaniel Judd
02:24:52
*horizontal
Harrison
02:26:31
Where is the webassing review?
Sam Baesler
02:27:28
@Harrison, I think they’re just talking abut WA9
Harrison
02:27:38
thnks
Katriina Jarvis
02:27:50
I think the reason that works is because if you multiply x -1/3 then you don’t get the top of the equation
Elijah Pierce
02:29:14
Can we do 13?
Zoe’s iPhone
02:30:13
can we go over population growth regarding doubling every x years
Nathaniel Judd
02:30:37
^
Nathaniel Judd
02:30:40
yeah I agree
Lucy Murff
02:30:44
Can we do #9 on fall 2016?
Kaden Monahan
02:31:11
Aren't we not doing horizontal asymptotes?
Jenney Kim
02:31:28
she’s going over the vertical asymptote part
Nathaniel Judd
02:31:32
no we aren't
Gabe Willes
02:31:44
no we aren’t doing horizontal
Lucy Murff
02:33:00
JK I figured it out on #9
Nathaniel Judd
02:33:08
After this, can we please go over population growth problems
Zachary Nielsen
02:33:16
^^^^^^^^
Ben Cochran
02:33:33
^^^^^
Lucy Murff
02:34:22
So we’re not doing limits x—> infinity on the test?
Lauren King
02:35:19
can we go over number 12?
Alex Cherry
02:37:59
@Lucy I think we would be able to, but it’s not likely considering the types of problems that have been done in class
Ryan Jensen
02:39:02
yo the paper homework is in the review section of the chapter right? I can't find the page numbers
Katriina Jarvis
02:39:34
@Ryan , literally thought you were a TA this whole time lol
Ryan Jensen
02:39:41
no freaking way lol
Alexandra Mantilla Arrayan
02:39:51
can you do question 55 from the last paper homework. It's about the inter. val. theorem
Lauren King
02:40:00
could we go over 13 as well?
Simon Tanner
02:41:14
could we do an intantanious velocity problem?
Lizeth Mendoza
02:41:38
^^^
Nathaniel Judd
02:41:44
so the webassign problems are randomly generated it seems, but the concept is going to help us all solve it despite the differences on each of our problems
Ryan Jensen
02:42:01
@simon that won't be on our test that has to do with differentiability
Simon Tanner
02:42:18
thanks
Spencer Searcy
02:44:37
why did you use e?
Leah Leavitt
02:44:49
it's just a formula for population
Nick York
02:44:57
yeah I don't know if u use e for this do you?
Spencer Searcy
02:45:09
ok
Alex Cherry
02:45:26
You do, because it is used for half-life and population growth equations
chloe
02:45:54
Can you go over how to find if it’s continuous or discontinuous when given a piecewise function?
Dallin Davis
02:47:41
Are calculators allowed?
Zachary Nielsen
02:47:47
no
Reese "Da Piece" Olsen
02:47:51
because its not starting at 0 yes
Reese "Da Piece" Olsen
02:47:56
starting at 24
Katriina Jarvis
02:48:07
No calculators on any calculus tests as far as I know
Brierton Sharp
02:48:13
When does the test close again?
Zachary Nielsen
02:48:21
Thursday at 1159
Leah Leavitt
02:48:23
but they can't really stop you
Zachary Nielsen
02:48:24
pm
Katriina Jarvis
02:48:30
Jesus is watching
Brierton Sharp
02:48:30
Thank you
Zachary Nielsen
02:48:41
^^
Penelope Bowden
02:48:52
Couldn't you use the equation 95*2^(t/8)
Zachary Nielsen
02:48:59
Or big brother is working
Nick York
02:49:01
yeah
Zachary Nielsen
02:49:02
watching
Leah Leavitt
02:49:13
that book was terrible lol
Maija Pearson
02:49:15
always watching wasowski
Reese "Da Piece" Olsen
02:49:52
95*2^t/8
Lauren King
02:50:07
I saw somewhere that 1/2 = e^-x ….. so 2 = e^x can someone explain?
Nathaniel Judd
02:50:14
wow, your mic is really loud
Zachary Nielsen
02:50:21
^^^
Reese "Da Piece" Olsen
02:50:32
not that
Brayden
02:51:04
but we no have calculator
Leah Leavitt
02:51:44
yeah bring the fing calculators
Leah Leavitt
02:51:48
let's goooo
Benjamin Taylor
02:52:01
can you go over 4 on the web assign
Nathaniel Judd
02:57:35
it just tells you the signs
Nathaniel Judd
02:57:40
that's all the interval means here
chloe
03:00:54
Can you go over how to find if it’s continuous or discontinuous when given a piecewise function?
Nathaniel Judd
03:03:52
just read it out to her
Nathaniel Judd
03:03:58
so she doesn't have to find it
Leah Leavitt
03:06:50
can I just say Rebecca you are an absolute g for doing this for us
Nathaniel Judd
03:07:02
Yeah she really knows her stuff too
Brayden
03:07:02
^
Tanner Esplin
03:07:06
That's facts
Divya Nikitha Kusuluri
03:07:33
does that mean number 10 is not part of test?
Nathaniel Judd
03:07:47
if it as things we haven't learned yet, then yeah
Nathaniel Judd
03:07:49
*has
Divya Nikitha Kusuluri
03:08:12
ok
Divya Nikitha Kusuluri
03:08:39
ok thank you
Katriina Jarvis
03:09:02
Rebecca, is there a recording being posted soon?
Tom Montoya
03:09:03
Thanks for this!
Katriina Jarvis
03:09:17
Where do they post it?
Katriina Jarvis
03:10:16
All multiple choice I think
Nathan Schafer
03:10:21
can you do #7 on webassign 10
Benjamin Taylor
03:10:25
its all multiple choice
Isaac Snider
03:10:53
Is there a time limit?
Benjamin Taylor
03:10:59
4 hours
Isaac Snider
03:11:08
thank you
Leah Leavitt
03:11:18
siiiick
Sydney Cluff
03:13:44
Would that be in brackets or parenthesis
chloe
03:14:59
Can you go over how to find if it’s continuous or discontinuous when given a piecewise function?
Lauren King
03:15:27
can we go over 19?
Leah Leavitt
03:19:50
GOD BLESS YOU REBECCA
Nathaniel Judd
03:19:54
^
McKenna
03:20:08
Thank you so much!!!!
Jacob Ordaz
03:20:14
Thanks!
Benjamin Taylor
03:20:28
You rock Rebecca!
chloe
03:20:31
Thank you so so much!!!!
Penelope Bowden
03:20:37
Thank you so much!
Katriina Jarvis
03:20:42
Thank you, Rebecca!