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Mathematics Corner :)

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    Ameeratul Layl's Avatar Full Member
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    Mathematics Corner :)

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    This is like any other educational corner.
    Only, this one will contain lots and lots of numbers compared to the rest

    Well, my dear brothers and sisters, do TRY to help each other as we are ordained to do so.
    I also hope that those who do not enjoy mathematics will soon come to love it.Its a very challenging subject but it is indeed great fun!!!!:coolsis:


    Allah ma3ak
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    Re: Mathematics Corner :)

    salam!
    hmmm....what do we exactly do here ?post problems in math?? its a good thread sis...m sure i can improve ...!
    ma'salamah
    Mathematics Corner :)

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    with Sabr (patience) and Salat (prayers): it is indeed hard, except to those who
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    Ameeratul Layl's Avatar Full Member
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    Re: Mathematics Corner :)

    format_quote Originally Posted by sanobar View Post
    salam!
    hmmm....what do we exactly do here ?post problems in math?? its a good thread sis...m sure i can improve ...!
    ma'salamah



    Yes sister, you type in questions regarding homeworks, courseworks or assignments.

    Allah ma3ik
    Mathematics Corner :)

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    Ameeratul Layl's Avatar Full Member
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    Re: Mathematics Corner :)



    Okay, a simple question for all:

    Who likes Algebra?
    *puts her hands up....* I do!

    If anyone needs any help...im here for algebra....okay!

    Allah ma3akum
    I have finally mastered the laws of Algebra *wat laws...?*lol.
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    Amira-Tul-Haya's Avatar Limited Member
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    Re: Mathematics Corner :)



    i like algebra 2 but i dnt need help wid it, i need help wid differentiatin n intergratin graph equations:confused: can ne1 help me?
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    Rabiyal's Avatar Full Member
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    Re: Mathematics Corner :)

    Hopefully I can...depends on what grade level we are talking about...
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    Amira-Tul-Haya's Avatar Limited Member
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    Re: Mathematics Corner :)

    format_quote Originally Posted by Rabiyal View Post
    Hopefully I can...depends on what grade level we are talking about...

    im doin AS level maths n need help in using the differentiated n intergrated equations 2 find different points on a graph n wether a point is a minimum or maximum
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    Rabiyal's Avatar Full Member
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    Re: Mathematics Corner :)

    I have done that stuff, it's been like over 8 yrs....but I am willing to try...
    So post the question...
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    Amira-Tul-Haya's Avatar Limited Member
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    Re: Mathematics Corner :)

    the question is:

    find the stationary pionts n state if its a minimum or a maximum point
    f(x)=2x squared - 9x squared + 12x -7

    how do u no if its a min or max?
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    Re: Mathematics Corner :)

    Wouldn't the equation be -7x squared? (because +2 add -9 is -7)
    Sorry, not part of your question but it does make it easier and I was just wondering.
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    Duhaa's Avatar Full Member
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    Re: Mathematics Corner :)

    You differentiate the equation.
    Use the rule 'Times by the power and reduce it by one'
    So your equation would be -14x +12
    Then differentiate again to give -14
    From this you can find if it's max or min.
    Sorry but I can't remember which way round it is. When I do find out, will post IA.
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    Amira-Tul-Haya's Avatar Limited Member
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    Re: Mathematics Corner :)

    format_quote Originally Posted by Savdah View Post
    Wouldn't the equation be -7x squared? (because +2 add -9 is -7)
    Sorry, not part of your question but it does make it easier and I was just wondering.

    dats how the question is given n examiners live just 2 make life hard 4 ppl.

    thanx 4 da help! :smile:
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    mohakem's Avatar Full Member
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    Re: Mathematics Corner :)

    As salamu alikum

    If the second derivative is less than 0, the point is a maximum point.
    If the second derivative is more than 0, the point is a minimum point.

    If the second derivative is 0, the point is neither a maximum point nor a minimum point.

    It's kind of 'oposite' to how you might think it woule be.

    Wa alikum salam
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    Re: Mathematics Corner :)

    salam!
    well algebra is fine with me ...but i hate trignometry there are just too many formulae.....i swear i can do anything in math but not trignometry ! and guess wat my paper has all trig init...it carries all the marks...

    ill ask my doubts later...!
    ma'salamah
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    Amira-Tul-Haya's Avatar Limited Member
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    Re: Mathematics Corner :)

    [If the second derivative is less than 0, the point is a maximum point.
    If the second derivative is more than 0, the point is a minimum point.

    If the second derivative is 0, the point is neither a maximum point nor a minimum point.

    It's kind of 'oposite' to how you might think it woule be.


    thanx 4 da help, i alwayz get confused wid dis, mayb i'll remembr it now or just fail da test i hv on friday if i dnt.

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    mariamq's Avatar Full Member
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    Re: Mathematics Corner :)

    Salam, I have 3 questions the first is an algebra one.. Im so lost at the moment and i cannot figure this out.. Im sure its easy for many but i just cannot get it.

    1. Use the formula A equals half bh to find A if b equals 9 and h equals 6.

    this one is not algebra.

    1. what is the length of a diagonal square of side 6 m? Give answer to one decimal place. (also how do i show the working to this answer?

    2. A flagpole is held steady by a wire connected to the pole 8 m above ground. The wire is also attached to the ground 3 m from the base of the pole. Find the length of the wire correct to 2 decimal places.

    I realllyyyyy neeed to know this, I have no idea about it.

    Jazakallah khair.

    Wa salam.
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    niqaabii's Avatar Full Member
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    Re: Mathematics Corner :)

    good news for u all!!!
    my husband is a maths teacher..so if anyone needs help ..then just let me kno.and ill get the answers for ya
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    Re: Mathematics Corner :)

    As salamu alikum

    Salam, I have 3 questions the first is an algebra one.. I'm so lost at the moment and i cannot figure this out.. I'm sure it's easy for many but i just cannot get it.

    1. Use the formula A equals half bh to find A if b equals 9 and h equals 6.

    this one is not algebra.
    A = bh / 2 (divided by 2) .

    Like it says; A equals half of bh.

    It's then simply a matter of substituting b = 9 and h = 6 into the equation,

    A = (9 * 6) / 2

    which gives us; A = 54 / 2 .This means A = 27

    2. what is the length of a diagonal square of side 6 m? Give answer to one decimal place. (also how do i show the working to this answer?
    Do you mean, "What is the length of the diagonal of a square of side 6m" ?
    If so, this requires Pythagoras theorm. (a^2 (a squared) + b^2 = c^2)

    Basically you split the square along the diagonal, leaving two triangles.Take one of the triangles, and you will notice that 2 sides are 6m in length.The other side, the hypotenuse (the diagonal) you must find.

    From the formula above give the sides you know the length of as 'a' and 'b' . The hypotenuse (the longest side - the diagonal) is 'c'.

    So, c = the square root of a^2 + b^2 . Therefore, c = squareroot of 6^2 + 6^2

    Plug the numbers into your calculator and then round of your answer to 1 d.p.

    3. A flagpole is held steady by a wire connected to the pole 8 m above ground. The wire is also attached to the ground 3 m from the base of the pole. Find the length of the wire correct to 2 decimal places.
    Again, Pythagoras theroem needs to be used here. The wire will be the hypotenuse (c) and the flagpole (8m) will be 'a', and the distance between pole and wire (3) will be 'b'.

    c (length of wire) = squareroot of a^2 + b^2 . Therefore c = squareroot of 64 + 9

    Its difficult to explain pythagoras theorm without diagrams of the triangles.You might want to take a look at http://www.bbc.co.uk/schools/gcsebit...oremrev2.shtml

    Wa alikum salam
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    mariamq's Avatar Full Member
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    Re: Mathematics Corner :)

    Jazakallah khair. May Allah reward you with a castle in jannah Ameen.. You have beed a great help Mashallah. Well i have more maths to do so inshallah if i dont understand i can just come here.. Once again Jazakallah khair.
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    Re: Mathematics Corner :)

    Salam,
    I have another one.

    A girl 1.5cm tall casts a shadow 2.0m long. At the same time of the day, a man 1.8 m tall casts a shadow x cm long. what is the length of the mans shadow and
    and how can we simplify the ratio 1.5 over 2.0 to one with whole numbers?
    Mathematics Corner :)

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