# ninale

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Greece
1. ## IB Math SL

I am sure that you can solve it but maybe you didn't understand what is the angle of depression.... so take a look at the triangle that I created for you Also open a book or ask your teacher or google the "angle of depression" if you still do not understand the exercise. AngleOFdepression.bmp
2. ## IA (HL) Math and Music IA

example 4 is quite the same.. but it took 9/20 http://14.140.95.113/r/ib-diploma-program/pdfs/teachers%20resource%20material/Math%20HL%20&%20SL/Maths%20HL/xmltwo.ibo.org/publications/DP/Group5/d_5_matsl_tsm_1205_1/html/content/exist/rest/app/tsm.xql_doc%3dd_5_matsl_tsm_1205_1_e%26part%3d2%26chapter%3d6.html Actually, it's not. I'm discussing Fourier series and analysis and complex tones. So please, if you don't have any idea about my IA (as apparently, you did not), don't criticize. ok:)) no worries. I didnt understand your topic and I am sure that I didnt want to offend you
3. ## IA (HL) Math and Music IA

example 4 is quite the same.. but it took 9/20 http://14.140.95.113/r/ib-diploma-program/pdfs/teachers%20resource%20material/Math%20HL%20&%20SL/Maths%20HL/xmltwo.ibo.org/publications/DP/Group5/d_5_matsl_tsm_1205_1/html/content/exist/rest/app/tsm.xql_doc%3dd_5_matsl_tsm_1205_1_e%26part%3d2%26chapter%3d6.html
4. ## Math Exploration - Fibonacci sequence (I NEED YOUR HELP)

also examples at http://14.140.95.113/r/ib-diploma-program/pdfs/teachers%20resource%20material/Math%20HL%20&%20SL/Maths%20HL/xmltwo.ibo.org/publications/DP/Group5/d_5_matsl_tsm_1205_1/html/content/exist/rest/app/tsm.xql_doc%3Dd_5_matsl_tsm_1205_1_e%26part%3D2%26chapter%3D2.html
5. ## Math Exploration - Fibonacci sequence (I NEED YOUR HELP)

sounds a good idea! did your teacher give you sample IA? check also http://tagilmore.geckos.sis.org.cn/files/2012/09/List-of-200-ideas.pdf
6. ## HELP Maths Hl excercise

Hi expand the second one and then multiply all with 3x and all with 7...if this is not clear tell me and I will write it to you analytically....
7. ## Math HL Question about finding the inverse of a rational quadratic function

well......you need to find the first derivative not the inverse...in the first question...
8. ## Math HL Question about finding the inverse of a rational quadratic function

also if in your test a question asks you to find the inverse of a quadratic function let's say f(x)=(x-1)(x-3) , x>2, you MUST write it first in vertex form , otherwise you cannot find the inverse...
9. ## Math HL Question about finding the inverse of a rational quadratic function

well in order to have an inverse , the function has to be one-to one. for example a quadratic function lets say f(x)=(x-1)(x-3) if you plot it, in order to have an inverse you have to choose either x>2 or x<2 (because you need a one to one) so in this exercise if you plot f(x) you will see a max at 2.44 ((root 6) because that's where the first derivative has a zero) so in order to be one to one choose the area x>2.44 (root6)
10. ## Extra exercises

which book are you using at school? Firstly download all past papers...they are sooooo many and you can do a lot of work... Also a very nice book is the one of Haese and Harris. you can find it online http://www.ops.org/high/central/Portals/0/STAFF_FOLDERS/T_SAND_CRAIG/IB%20HL%20Mathematics%20Textbook.pdf (just googled it and thats what i found) and google for the solutions as well but i dont think is for the new syllabus 2014 ..but its ok as the new syllabus differs a little bit from the old one.. Also a good book (more difficult) is mathematics higher level Fabio Cirrito , but it is not easy
11. ## Binomial Expansion

you need to expand (3x+1)^9 and see which combinations fit you... so (2-x)[(3x)9+(9C1)(3x)811+(9C2)(3x)712+(9C3)(3x)613 +(9C4)(3x)514+...] so you simply need 2(9C3)(3x)613+(-x)(9C4)(3x)514 in order to have only powers of 6

13. ## General math learning, studying, and reviewing tips?

You just have to be organized... 1. Practice a lot! 2. when you finish a chapter: a. print the syllabus for this chapter and see what you know and what you dont know b. solve A LOT of exercises from your book c. practice past papers for this chapter.. in www.ibmathlessons.com you can find all past papers sorted by subject with their solutions. for example if you study Sequences you will find notes and past papers for sequences...Check the free sample material and good luck
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