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!! Maths HL paper 1 2016 - Before and After

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13567

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    #62
    louisoc
    Registered Users Posts: 32 ✭louisoc


    Anyone else get like (3.2, 1.6) for the point the pattern was approaching in the sequences question?


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    #63
    CreepyOnion
    Registered Users Posts: 27 ✭CreepyOnion


    The integration question with the ball was the average value, right? So 1/b-a?


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    #64
    MomijiHime
    Registered Users Posts: 620 ✭✭✭MomijiHime


    I thought it was a weird paper..


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    #65
    DublinArnie
    Closed Accounts Posts: 2,823 ✭✭✭DublinArnie


    CreepyOnion wrote: »
    The integration question with the ball was the average value, right? So 1/b-a?

    Yeah


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    #66
    randomlad727
    Registered Users Posts: 29 ✭randomlad727


    louisoc wrote: »
    Anyone else get like (3.2, 1.6) for the point the pattern was approaching in the sequences question?

    Yeah I got those values


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    #67
    TSMGUY
    Closed Accounts Posts: 855 ✭✭✭TSMGUY


    louisoc wrote: »
    Anyone else get like (3.2, 1.6) for the point the pattern was approaching in the sequences question?

    oh F***. I thought they meant it was converging to zero. I said zero for both and wrote a load of ****e about limits. Didn't know they wanted co-ordinates


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    #68
    DA7800
    Registered Users Posts: 123 ✭✭DA7800


    I thought it was a very nice paper! It went a lot better than it could have. It does have me worried for paper 2, though. Paper 2 is my weaker paper.

    I got 29 degrees for my acute angle, inverse tan of the difference between the two slopes.


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    #69
    CreepyOnion
    Registered Users Posts: 27 ✭CreepyOnion


    Who knows, maybe they've just permanently made the papers easier. One can dream ;)


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    #70
    Appmaths97
    Registered Users Posts: 28 ✭Appmaths97


    DublinArnie wrote: »
    How did you guys find the angle?

    I TanQ = rate of change of slope (diff twice), then tan inverse to find the angle.

    i got the fist derivative and found the slope for that point
    i got -1.3 slope is rise over run the rise was -1.3 and the run was 1 and i tan inversed that


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    #71
    Soolander
    Registered Users Posts: 72 ✭✭Soolander


    F*** i just realised my calculator was in radian mode when i was trying to calculate the angle. No wonder i couldnt get it. F******* stupid mistake.


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    #72
    TSMGUY
    Closed Accounts Posts: 855 ✭✭✭TSMGUY


    Appmaths97 wrote: »
    i got the fist derivative and found the slope for that point
    i got -1.3 slope is rise over run the rise was -1.3 and the run was 1 and i tan inversed that

    teach me how do the "fist" derivative, I never learned that:)


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    #73
    Giotar
    Registered Users Posts: 48 ✭Giotar


    Probably the easiest HL Maths exam I've ever done.


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    #74
    Giotar
    Registered Users Posts: 48 ✭Giotar


    louisoc wrote: »
    Anyone else get like (3.2, 1.6) for the point the pattern was approaching in the sequences question?

    Yep sounds familiar.


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    #75
    louisoc
    Registered Users Posts: 32 ✭louisoc


    For finding the parabola of g(x), what did I have to do? I dicked around with the translation figures I got and ended up with some sort of a curve equation, but I didn't get time to see whether it worked.


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    #76
    daraghwal
    Registered Users Posts: 946 ✭✭✭daraghwal


    So to get the angle was it. 1. get the slope at the point of the hoop by differentiating the equation and subing in the values, 2. Find theta (howevery you spell that) by using the Tan theta formula to find angle between two lines. I found the slope of the line to be -1.2 something and the other 0, then got tan inverse of that and came out with something like 52?


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    #77
    legocrazy505
    Closed Accounts Posts: 691 ✭✭✭legocrazy505


    Better than my mock but just realised now I didn't fully finish the inverse function. Should get most of the marks. Didn't get some things, probably high C at least but it really depends on the marking schemes.

    Happy there wasn't any overly difficult geometric series or arithmetic in it. Would have liked some financial but the paper overall wasn't bad so I won't complain about it being left out.


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    #78
    Giotar
    Registered Users Posts: 48 ✭Giotar


    legocrazy505 wrote: »
    Better than my mock but just realised now I didn't fully finish the inverse function. Should get most of the marks. Didn't get some things, probably high C at least but it really depends on the marking schemes.

    That's the one thing I screwed up on and I'm kicking myself because I felt as if my exam was borderline B3/C1. For some reason my brain told me that -1 meant derive it, not find the inverse :(


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    #79
    Soolander
    Registered Users Posts: 72 ✭✭Soolander


    So now that Paper 1 is finished anyone have any notions about Paper 2? I think external circles might come up.


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    #80
    smartz
    Registered Users Posts: 63 ✭✭smartz


    Can someone post the paper?


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    #81
    LFC CONNAUGHTON
    Registered Users Posts: 388 ✭✭LFC CONNAUGHTON


    Realise now I messed up that slope question and didn't do the inverse function right either, there goes my hope at an A more than likely :(


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    #82
    Soolander
    Registered Users Posts: 72 ✭✭Soolander


    Was the inverse function not f(x) = y , x on its own , replace y with x ?


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    #83
    Corkalex
    Registered Users Posts: 30 ✭Corkalex


    I have a feeling that they'll throw a financial maths question into paper two :/


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    #84
    emersyn
    Registered Users Posts: 430 ✭✭emersyn


    That has to have been one of the nicest maths papers ever written!! Really happy, let's hope paper 2 isn't awful now


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    #85
    legocrazy505
    Closed Accounts Posts: 691 ✭✭✭legocrazy505


    Soolander wrote: »
    Was the inverse function not f(x) = y , x on its own , replace y with x ?

    Yeah pretty much.

    Let f(x)=y
    Switch the x and y
    Solve for y
    Replace y with f^-1(x)

    I forgot to fully solve it basically.


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    #86
    daraghwal
    Registered Users Posts: 946 ✭✭✭daraghwal


    smartz wrote: »
    Can someone post the paper?

    I would be hoping people handed up their papers :D


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    #87
    luftmensch
    Closed Accounts Posts: 140 ✭✭luftmensch


    smartz wrote: »
    Can someone post the paper?

    It should be up on examinations.ie at around 6:00pm.
    Corkalex wrote: »
    I have a feeling that they'll throw a financial maths question into paper two :/

    I really doubt it. Financial maths is paper 1 material.


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    #88
    Oisin1001
    Registered Users Posts: 19 ✭Oisin1001


    Anybody know how to get the last part of Q8(b) where you have to get the formula for g(x), which is the path of the second basketball thrown? Think that was one of the two parts I didn't get worked out completely in the end.


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    #89
    MomijiHime
    Registered Users Posts: 620 ✭✭✭MomijiHime


    daraghwal wrote: »
    I would be hoping people handed up their papers :D

    People who do it through Irish get to keep the English paper.


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    #90
    hubluh
    Registered Users Posts: 69 ✭✭hubluh


    Oisin1001 wrote: »
    Anybody know how to get the last part of Q8(b) where you have to get the formula for g(x), which is the path of the second basketball thrown? Think that was one of the two parts I didn't get worked out completely in the end.
    I think you get the perfect square of the first equation and replace the max point in f (x) for the max of g (x)?


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    #91
    DublinArnie
    Closed Accounts Posts: 2,823 ✭✭✭DublinArnie


    Oisin1001 wrote: »
    Anybody know how to get the last part of Q8(b) where you have to get the formula for g(x), which is the path of the second basketball thrown? Think that was one of the two parts I didn't get worked out completely in the end.

    I used the complete square method by using the turning point to form an equation, but I'm not sure if that's correct.

    (x-h)^2 + K


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