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    just a few question that are baffling me, please help, it will be appreciated

    1) Find the term independant of x in the expansion of (x-2/x)6

    is there an idependant erm of x considering it is on both sides, would the answer be 64/x6

    The point A is (5,6). prove that the nearest point on the circle (x-1)²+(y-3)² =4 is 3 units away from A.
    I find the equation from the line between the centre of the circle and point A but then how do I prove it is 3 units away from it
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    see here for the first q.

    http://www.thestudentroom.co.uk/show...21#post2389121
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    (Original post by Fermat)
    see here for the first q.

    http://www.thestudentroom.co.uk/show...21#post2389121
    I can't do emperical formulas like that this is for my FSMQ(between gcse and as) I can't understand all that jargon
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    Sorry!

    Can you use pascal's triangle to expand the expression?
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    (a+b)^6 = a^6 + 6.a^5b + 15a^4b^2 + 20a^3b^3 + 15a^2b^4 + 6ab^5 + b^6

    does that help?

    Find out in what term the powers cancel.
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    For example, if we substitute for a = x and b = -2/x in the middle term we get,

    20a^3b^3 = 20x^3(-2/x)^3
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    (Original post by Meat Loaf Rocks)
    ...
    I find the equation from the line between the centre of the circle and point A but then how do I prove it is 3 units away from it
    Find out where the line intersects the (eqn of) the circle.

    or,

    Let O be the centre of the circle.
    Find the distance OA
    Subtract the radius (r=2) from this distance
    Ans should then be 3.
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    (Original post by Meat Loaf Rocks)
    So basically you do binomial expansion and then draw out an integer factor and that is the answer?
    where the powers cancel - yep
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    Can you do the second uestion becasue the bit I got stuck on keeps reoccuring in every mock and I need to get a grip of it before the exam
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    O(1,3)
    A(5,6)
    OA =√{(5-1)² + (6-3)²}
    OA = √{16 + 9}
    OA = √25
    OA = 5

    let OA intersect circle at B

    radius = 2

    :. OB = 2
    :. BA = 5 - 2 = 3
    =============

    Edit see also my earlier post about this q.
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    God i feel like an idiot, that was simple
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    (Original post by Meat Loaf Rocks)
    God i feel like an idiot, that was simple


    you've been doing too much maths - common problem at the mo'
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    (Original post by Fermat)


    you've been doing too much maths - common problem at the mo'
    true I have done 3 2 hour mocks in da last 2 days,
    lucky what i can do I can do easily and quickly, so it hasn't been too bad
 
 
 
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