IB Math Studies Topic 1 Revision: Number and Algebra (May 2015)

For IB Math Studies Revision:
Topic #2: Number and Algebra Revision consisting of 5 sections:
1. Arithmetic and Geometric Sequences and Series
2. Sets (starts at 20:23)
3. Approximation, Significant Figures and Percentage Error (starts at 27:42)
4. Systems of Linear Equations (starts at 33:28)
5. Quadratic Equations (starts at 39:57)

[LeonLight]

YOURE THE ONLY GUY IN YOUTUBE, WHO TEACHES MATH STUDIES IN DEPTH. PLEASE DONT STOP MAKING VIDEOS! THEY R HELPFULLLL!

[RickParina]

Hi Brianne, the reason the + changes to a - when you get rid of the brackets is that you have distribute the - to BOTH terms in the brackets. So -(k + 4) is actually like saying -1 x k plus -1 x 4 (a negative by itself is the same as -1) so you get -k - 4 after you distribute. Hope that helps, good luck on your exams!

[RickParina]

+Greivin Vega Aguilar - In order to show that k = 2, you have to subtract the second and first terms and make it equal to the difference of the 3rd and 2nd terms.  For instance, if you had the sequence 5, 10, 15... 10-5 = 15-10.  So in the problem we need to do the following: (5k+2) - (k+4) = (10k-2) - (5k+2).  Those ones can be a little tricky, but it tells you the answer for k is 2 so you can always just use that to complete the rest of the problem even if you do not get the part A.  Hope that helps.

[jinyoungyang]

I cannot even put into words of how thankful I am for your videos. Keep up the great work! And thank you again!!!!

[MrRonak]

Your going global Mr Parina! IB student Shout out from Dubai, UAE! Your videos helped me get a 6 on my mocks i hope they've helped me push that to a 7 this time round when it counts :) Thank you so much for your hard work

[vlaura.]

I have my Exams tomorrow and I just wanted to say thank you sir for making the effort to explain everything step by step, this helped me a lot to understand a lot !!!! :)

[rabiafraij]

I've got my IB 11 final exam tomorrow for math (we have midterms and finals as practice) and you've saved my life! Amazing! Thank you!!

[rodoesyt]

THANK YOU SO MUCH FOR THESE VIDEOS - THEY HELP SO MUCH

[BrianneMathias]

Thanks so much! That makes sense now. Showed your videos to my cohort at my IB school in Australia and they find it very useful for revision! :)

[RickParina]

Yes you can use your own calculator. The only two apps that you are allowed to have are Finance and PlySmlt2. There is a program for the Ti-84 which disables all the other apps. If your school is making you use a different calculator make sure that you transfer Plysmlt2 to it beforehand. It would be real disadvantage not to have that APP for simultaneous equations and solving equations.

[GLSAK]

Hey Mr. Parina, Unaiza here I used to be in your Math Studies class last year and I found these while doing revision! I miss your teaching style sir! These videos are so helpful!

[RickParina]

They should be if you have a graphing calculator. That includes the TI-82, 83 and 84 series. You can also use a TI-Nspire CX or TI-89, but the methods for doing the same calculations on those calculators are a little different and not addressed in the videos. You might have to download the plysmlt2 APP from the TI website if you do not have it or get a friend to transfer it to you from another calculator.

[Gonemobbing]

This has helped out so much I was lost during class and tomorow I have a test in all this and I think I might be ready just need to watch it once more after this.

[RickParina]

Hey Unaiza! Great to hear from you. We missed you this year.

[bomborikuna]

You are the best:) I love you. You are just making everything so clear and understandable :) plus that you show how to use calculator. Amazing I wish every teacher was like you. Keep being cool. Thank you.

[greivinvegaaguilar]

Hello Richard, I have a question, Why you use in the aritmetic problem about equations in the option "A"  the value 5k+2 again? thanks

[juliusberger]

Thank you so Dont stop making these videos, they are so Thanks

[kallenummelin]

Can I apply these videos to my revision for the May 2015 exams?

[RachelChiara]

Hi! these are super helpful, but I was wondering why you got r to the power of 2 at 17:30 in the video, since you said you divide the two equations? Is it because you subtract the exponents? Thank you!

[aboodtahleh]

you just helped me revise for me final today thank you sooo much, your students are lucky.