sanadiwan2006 Posted May 15, 2014 Report Share Posted May 15, 2014 Fairly easy, wasn't it?After Paper 1- it was definitely a relief!Just hope the boundaries don't go too high.I'm expecting 80 on 120 (couldn't finish the paper). What are you expecting? Reply Link to post Share on other sites More sharing options...
RG_2995 Posted May 15, 2014 Report Share Posted May 15, 2014 Hey so I guess 24 hours is up and my paper was not good. There were a lot of probability questions and I hated it. I think I got all the probability questions wrong. How did u guys find it. Hoping for low grade boundary. Reply Link to post Share on other sites More sharing options...
SeifAdam Posted May 15, 2014 Report Share Posted May 15, 2014 Did any body solve the implicit differential equations question? Because I wasted 10 mins trying to figure out why I got 0 as a denominator in b) and I still don't know why. If any body remembers the question please tell me and tell me the answer that u got. btw overall the paper was way easier than paper 1, it's easy if you're good at probability Reply Link to post Share on other sites More sharing options...
Nebula Posted May 15, 2014 Report Share Posted May 15, 2014 I actually found it a relief too compared to paper 1! Although it wasn't amazing, it was better. For the implicit differentiation, I got an undefined value (1/0 I think?) ... so I thought I had gotten something wrong and moved on.. Apparently it is supposed to be undefined, because the gradient of the normal is then 0 (negative of the reciprocal)! 1 Reply Link to post Share on other sites More sharing options...
SeifAdam Posted May 15, 2014 Report Share Posted May 15, 2014 I actually found it a relief too compared to paper 1! Although it wasn't amazing, it was better. For the implicit differentiation, I got an undefined value (1/0 I think?) ... so I thought I had gotten something wrong and moved on.. Apparently it is supposed to be undefined, because the gradient of the normal is then 0 (negative of the reciprocal)! Same here, I thought about doing that but then I thought that the Ib won't ask a stupid question like that so I moved on... Apparently I was wrong Reply Link to post Share on other sites More sharing options...
XeoKnight Posted May 15, 2014 Report Share Posted May 15, 2014 Whoops, I just made a topic on this cuz I thought it wasn't made lol.Did any body solve the implicit differential equations question? Because I wasted 10 mins trying to figure out why I got 0 as a denominator in b) and I still don't know why. If any body remembers the question please tell me and tell me the answer that u got. btw overall the paper was way easier than paper 1, it's easy if you're good at probabilityI got undefined as well! I thought I did it wrong as well so I left it at that, I didn't want to waste time looking for my mistake. My friends told me that if you get undefined you're supposed to take 1 or -1 or something as the gradient of the normal, or 0 like someone here said?, so I guess I got part a at least (which was most of the marks, huzzah). Or maybe we all did the same mistake, which would be weird.There were so many distributions in section A though! Not that I'm complaining, but I was hoping for them to turn up in Section B so that I get a tonne of marks for that, I found those pretty easy before. Did anyone catch a Viete's Theorem question? I think I did find one which had to do with the roots of a question but I didn't finish it. 1 Reply Link to post Share on other sites More sharing options...
SeifAdam Posted May 15, 2014 Report Share Posted May 15, 2014 Whoops, I just made a topic on this cuz I thought it wasn't made lol.Did any body solve the implicit differential equations question? Because I wasted 10 mins trying to figure out why I got 0 as a denominator in b) and I still don't know why. If any body remembers the question please tell me and tell me the answer that u got. btw overall the paper was way easier than paper 1, it's easy if you're good at probabilityI got undefined as well! I thought I did it wrong as well so I left it at that, I didn't want to waste time looking for my mistake. My friends told me that if you get undefined you're supposed to take 1 or -1 or something as the gradient of the normal, or 0 like someone here said?, so I guess I got part a at least (which was most of the marks, huzzah). Or maybe we all did the same mistake, which would be weird.There were so many distributions in section A though! Not that I'm complaining, but I was hoping for them to turn up in Section B so that I get a tonne of marks for that, I found those pretty easy before. Did anyone catch a Viete's Theorem question? I think I did find one which had to do with the roots of a question but I didn't finish it.yeah there was a question involving viete's theorom but I couldn't do it as well Reply Link to post Share on other sites More sharing options...
StormySky Posted May 15, 2014 Report Share Posted May 15, 2014 (edited) Did any body solve the implicit differential equations question? Because I wasted 10 mins trying to figure out why I got 0 as a denominator in b) and I still don't know why. If any body remembers the question please tell me and tell me the answer that u got. btw overall the paper was way easier than paper 1, it's easy if you're good at probabilityYup, the denominator was definitely zero! I think it's a vertical asymptote and that's probably why dy/dx does not exist there. I thought I was doing it wrong but I let it be and justified it as an asymptote. In retrospection, I think I could have just graphed on the calculator and checked! Edited May 15, 2014 by StormySky Reply Link to post Share on other sites More sharing options...
OctoPauly Posted May 15, 2014 Report Share Posted May 15, 2014 Much easier than paper 1, I suppose overall the papers had a decent balance then. I guess the peculiar result for Q10 was to be expected, otherwise it would have been far too simple compared to other Q10s. Reply Link to post Share on other sites More sharing options...
Guest Posted May 15, 2014 Report Share Posted May 15, 2014 That implicit differentiation question was really wonky. I thought I differentiated it wrong when I got -4/0 and did it again in the answer booklet but I got the same answer. I just wrote that there can't be a normal or something like that.My friends said that the normal was y = 0 or something for some reason.I think I did better on paper 2 than paper 1. I couldn't do part (d) of question 14 though. Should have taken physics instead of chem.I think the grade boundaries will be balanced out by paper 1 and 2 into the low to mid 70%s range but it does depend on paper 3.....................fffufuufufufuufufuufufufupfdpsofjskljljdfsifj Reply Link to post Share on other sites More sharing options...
Chuchu1224 Posted May 15, 2014 Report Share Posted May 15, 2014 I am glad I was not the only one who got 0 for the gradient. I just wish I had written that, I would have gotten one more point :/ Reply Link to post Share on other sites More sharing options...
rinik Posted May 15, 2014 Report Share Posted May 15, 2014 I am expecting somewhere around 90 marks.I did not find it easy. However my definition of easy is scoring above 105 marks. I also felt that it was longer than previous papers. 1 Reply Link to post Share on other sites More sharing options...
8thomas Posted May 15, 2014 Report Share Posted May 15, 2014 (edited) Did any body solve the implicit differential equations question? Because I wasted 10 mins trying to figure out why I got 0 as a denominator in b) and I still don't know why. If any body remembers the question please tell me and tell me the answer that u got. btw overall the paper was way easier than paper 1, it's easy if you're good at probabilityI GOT EXACTLY THE SAME PROBLEM!!!! I looked for a mistake in the calculus for 5 min at least. Don't know whether there was a mistake in the paper or not. Paper 2 was much easier for me than paper 1. Edited May 15, 2014 by 8thomas Reply Link to post Share on other sites More sharing options...
Vioh Posted May 15, 2014 Report Share Posted May 15, 2014 Did any body solve the implicit differential equations question? Because I wasted 10 mins trying to figure out why I got 0 as a denominator in b) and I still don't know why. If any body remembers the question please tell me and tell me the answer that u got. btw overall the paper was way easier than paper 1, it's easy if you're good at probability Yup, the denominator was definitely zero! I think it's a vertical asymptote and that's probably why dy/dx does not exist there. I thought I was doing it wrong but I let it be and justified it as an asymptote. In retrospection, I think I could have just graphed on the calculator and checked! I thought of the exactly the same thing during the exam. But just the moment i turned on my calculator, i realized that it cannot be graphed, because it is a function of both x and y (basically it wasnt a function). The IB is really nasty this time! Reply Link to post Share on other sites More sharing options...
kll407 Posted May 16, 2014 Report Share Posted May 16, 2014 That implicit differentiation question was really wonky. I thought I differentiated it wrong when I got -4/0 and did it again in the answer booklet but I got the same answer. I just wrote that there can't be a normal or something like that.My friends said that the normal was y = 0 or something for some reason.I think I did better on paper 2 than paper 1. I couldn't do part (d) of question 14 though. Should have taken physics instead of chem.I think the grade boundaries will be balanced out by paper 1 and 2 into the low to mid 70%s range but it does depend on paper 3.....................fffufuufufufuufufuufufufupfdpsofjskljljdfsifjThat implicit differentiation question was really wonky. I thought I differentiated it wrong when I got -4/0 and did it again in the answer booklet but I got the same answer. I just wrote that there can't be a normal or something like that.My friends said that the normal was y = 0 or something for some reason.I think I did better on paper 2 than paper 1. I couldn't do part (d) of question 14 though. Should have taken physics instead of chem.I think the grade boundaries will be balanced out by paper 1 and 2 into the low to mid 70%s range but it does depend on paper 3.....................fffufuufufufuufufuufufufupfdpsofjskljljdfsifjI think the normal was y=1. dy/dx = 0 so the slope is zero, but to substitute it back into the point (1,1) as given by the question, the normal is the y=1 line. Reply Link to post Share on other sites More sharing options...
Negotiation Posted May 16, 2014 Report Share Posted May 16, 2014 Does anyone remember the actual equation we had to differentiate? Reply Link to post Share on other sites More sharing options...
SeifAdam Posted May 16, 2014 Report Share Posted May 16, 2014 Does anyone remember the actual equation we had to differentiate?I think it was (x^2 + y^2)^2 = 4xy^2 Reply Link to post Share on other sites More sharing options...
Ibdying Posted May 17, 2014 Report Share Posted May 17, 2014 Does anyone know approximately what we need to get out of 120 for a 7? :/ Reply Link to post Share on other sites More sharing options...
fufufuufufufufuuu Posted May 17, 2014 Report Share Posted May 17, 2014 Does anyone know approximately what we need to get out of 120 for a 7? :/based on 2013, for P1 and P2 you need to get about 85-87 or so... and 46++ for P3 1 Reply Link to post Share on other sites More sharing options...
ibsurvivor269515 Posted May 17, 2014 Report Share Posted May 17, 2014 Did any body solve the implicit differential equations question? Because I wasted 10 mins trying to figure out why I got 0 as a denominator in b) and I still don't know why. If any body remembers the question please tell me and tell me the answer that u got. btw overall the paper was way easier than paper 1, it's easy if you're good at probabilityya well they said the equation of the normal so slope of normal = - slope of tangent so the equation was y - y0= 0 Reply Link to post Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.