<p>Anyone take paper 1 today? I took both that and AP AB Calc, and thought the AP exam was eating cake compared to this. The first ten I went through pretty fast but the rest I had to bs and guess my way through it.</p>
<p>Compared to previous years, I thought it was so much easier :-D I bs'ed the Poisson distribution one. When I was studying I was like ehhhh...this isn't core...this is stats option haha. Luckily there's the formula packet :-p And thank goodness the only vector/3-D geommetry question was to find a cross product and show parallel lines hehe. Overall, I'm happy. Thought I did pretty good :-)</p>
<p>What killed me was that probability question with the seats and the 6 people? I didn't know what to do so I skipped it. I also forgot how to show independent probabilities, and could not put that one problem with sins and cos into exact values so I left it in decimals.</p>
<p>LoL, at the beginning I was kinda just taking my time, enjoying the scenery, and then after an hour passed I was like omg I need to get working. But overall I thought it was ok. Harder than the specimen paper though, that threw me off.</p>
<p>By the way, is anyone out there taking IB Further Mathematics SL?</p>
<p>oh yea, the probability question...i forgot how to do that...doh. i did 7 choose three plus eight times six. for the independent probabilities just multiply P(A) and P(B) to show that it doesn't equal P(AnB). What sins cos one? the one with the triangle asking you to find the area?</p>
<p>there were no further mathematics at my school. i was the only hl (heh), most were math methods, and a couple were math studies.</p>
<p>God the triangle one was a beast. You had to use cosine rule to find one edge, which had two possible answers, and since it was an ASS triangle (angle side side HAR HAR sorry not funny) you had to demonstrate that the smaller edge was the one to use (sine rule, test with other edges) and then use the A = 1/2 sin(x) a b formula to find area.</p>
<p>IB questions are fun to complete haha.</p>
<p>how did u guys find paper 2. That velocity question was sooo easy, I was so happy. Did you get the Matrix proof?</p>
<p>Yeah i got the matrix one... didn't get the question before that though (the general solution one). I just scribbled out a bunch of work and at the end drew a sad face haha.</p>
<p>Paper 2 went pretty well compared to paper 1. I'm pretty sure I got all of 2, 3, and 4 right. I got most of the matrix one except when they asked to find the general solution (i just scribled some bs numbers lol), and also about half of the vector one. I got up to the point where it asked to find the line that passes through A (I had no idea more bs) and then find the area of the pyramid (i was tempted to a write a big *** on the paper for that one lol). Overall I was happier over this one than paper 1.</p>
<p>IB HL Math is pretty crazy. All I gotta say. Good luck to anyone that tries that monster of a test.</p>
<p>It ****es me off how schools don't recognize the difficulty of it, like, they take a 4 or 5 on AP Calc BC but only a 7 on an HL test... that's pretty retarded. I mean, it may be breadth, but it goes pretty far in depth too, I remember an integration by iteration and stuff on paper one... and it covers stats/probability, 3d geometry, and an option that can be considered graduate level work if you select stuff that's not series/diff eqs. BWARHRHHGAHH</p>
<p>Yeah especially since on paper 3 we have to do abstract algebra which I heard is what most college students do in their 3rd year.</p>
<p>What option are you guys doing for paper 3?</p>
<p>Abstract Algebra rofl. I heard this subject does not appear on most college courses until Junior Year. I'm screwed.</p>
<p>Oh my f'ing god, are you freaking kidding me.</p>
<p>Paper 3 has annhilated any and all chance at a 7 or even a 6 (Series and Diffeqs). Augghhhhh.</p>
<p>I took the same option...big mistake on my part. I didn't know the option topic was changed until like 20 minutes in -____-;; (It used to be series and approximation...BIG difference in topic and difficulty)...</p>
<p>With 15 minutes left I realized I should have done statistics. I wanted to shoot myself then, and still do.</p>
<p>RisingSun I also chose Section C (Series and DEFQs) Dude *** was number 5 bro?? Here are my answers:</p>
<p>Eulers approximation of y - 3.5
DEFQ equation: y= f(x) --> y = sin(x) + 2
3 a) lim x-->oo I got .5
b) lim x-->oo I got 0</p>
<p>umm number 4 was a bunch of writing and explanation and number 5 i didnt even get to, so im pretty much fuc ked</p>
<p>Hahahhaa yeah those were the answers I got too actually. Hey not bad. Yeah, number 4 was just completely bs... no idea what I was doing, I was throwing in limit comparisons in and junk but was not good... </p>
<p>Yeah I realized in that I should've done sets relations and groups... I just hope to god they curve it like crazy.</p>
<p>The sets, relations and groups paper was okay with the exception of question 5. It was such a ****<em>. I answered it, but so badly! For anyone who did it I think the trick was that you had to start with proving identity. Anyway, this is roughly what I put.
Identity:
since a, b belong to H and a and b are arbitrary
a</em>b^-1 belongs to H
so,
a*a^-1 belongs to H
thus
e belongs to H.</p>
<p>Then for inverse:
since e belongs to H one can say
e, a belong to H so e*a^-1 belongs to H so a^-1 belongs to H.
Thus, each element has an inverse.</p>
<p>Finally, for closure: (this is where it kind of broke down)
since each element has an inverse a, b^-1 belongs to H
so,
a<em>(b^-1)^-1 belongs to H
so a</em>b belongs to H so it is closed</p>