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Maths Ordinary Q8vi,answer anyone?

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    #2
    philologos
    Closed Accounts Posts: 22,479 ✭✭✭✭philologos


    What I did was. I took the value when y=1 on my graph looked for what value x was when y=1 and subbed 1 to y and subbed the value I found for x and found c by working it out as a normal equation.


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    #3
    titan18
    Registered Users Posts: 12,005 ✭✭✭✭titan18


    I wrote down 2 i think.You might aswell have a complete guess at it.The slope is -3 though.I knew that as y=mx+c.But i dont think that had anything to do with the question


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    #4
    xxxkacixxx
    Closed Accounts Posts: 6 ✭xxxkacixxx


    what I did was took -3 as the slope and put that equal to the derivative from earlier and got a value for x, I then put that into the original equation and got the value for y. I then slotted them into y=3x+c and got 9 I think.
    This was just complete guessing though and hope I got it right.;)


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    #5
    Scrivo
    Registered Users Posts: 35 ✭Scrivo


    Anybody notice the typo on 2b (ii) ? The 75 to the power of dot. Had be confused for ages, couldn't figure out if the dot stood for something and I just didn't know it. Extra marks all round I reckon :D


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    #6
    eoinfitzpatrick
    Registered Users Posts: 4 ✭eoinfitzpatrick


    I teach leaving cert honours. 9 is correct. Very difficult. Congrats if you got it


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    #7
    eoinfitzpatrick
    Registered Users Posts: 4 ✭eoinfitzpatrick


    Dot is a full stop. Every question finishes with one


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    #8
    Scrivo
    Registered Users Posts: 35 ✭Scrivo


    Look where the full stop is on that question though. I found it quite misleading...


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    #9
    philologos
    Closed Accounts Posts: 22,479 ✭✭✭✭philologos


    eoinfitzpatrick wrote: »
    I teach leaving cert honours. 9 is correct. Very difficult. Congrats if you got it

    Agh, I got -5, thanks for the info anyway.


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    #10
    xxxkacixxx
    Closed Accounts Posts: 6 ✭xxxkacixxx


    eoinfitzpatrick wrote: »
    I teach leaving cert honours. 9 is correct. Very difficult. Congrats if you got it



    yay thanks a million for that! Got one thing right then :D


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    #11
    Twee.
    Moderators, Recreation & Hobbies Moderators Posts: 9,722 Mod ✭✭✭✭Twee.


    Scrivo wrote: »
    Anybody notice the typo on 2b (ii) ? The 75 to the power of dot. Had be confused for ages, couldn't figure out if the dot stood for something and I just didn't know it. Extra marks all round I reckon :D

    Lol me too I was like what **** does the dot mean?! But then I looked at the other questions and saw they all ended in a full stop.


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    #12
    SB-08
    Registered Users Posts: 566 ✭✭✭SB-08


    My graph did'nt work out very well. What were the points? And what shape was the curve meant to be in? Cheers


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    #13
    titan18
    Registered Users Posts: 12,005 ✭✭✭✭titan18


    I had 2 for 2 of them -2 for 2 of them and 0 for 1 of them


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    #14
    IHATECHEMISTRY
    Closed Accounts Posts: 9 ✭IHATECHEMISTRY


    A dot...misleading???

    tbh, think thats looking for excuses, made no difference to the overall question.


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    #15
    IHATECHEMISTRY
    Closed Accounts Posts: 9 ✭IHATECHEMISTRY


    Look where the full stop is on that question though. I found it quite misleading...
    IHATECHEMISTRY wrote: »
    A dot...misleading???

    tbh, think thats looking for excuses, made no difference to the overall question.


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    #16
    irishbucsfan
    Registered Users Posts: 37,978 ✭✭✭✭irishbucsfan


    I got 9...

    But the thing is, I did it completely wrong. Im pretty sure I just got that answer by fluke, but I didnt show too many workings either... what are the chances Ill get some marks?


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