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C2 Maths- Binomial Expansion Plesae help if you can watch

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    Hi im really stuggling with this question, any help would be much appriciated:
    For the binomial expansion, in descending powers of x, of

    (x^3-1/2x)^12,

    a) find the first 4 terms, simplifying each term

    b) Find in its simplest form, the tem independant of x in this expansion

    thanks in advance for ANY help
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    Ok, what do you know?
    nCr familiar?
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    (Original post by beccajonesy)
    Hi im really stuggling with this question, any help would be much appriciated:
    For the binomial expansion, in descending powers of x, of

    (x^3-1/2x)^12,

    a) find the first 4 terms, simplifying each term

    b) Find in its simplest form, the tem independant of x in this expansion

    thanks in advance for ANY help
    Do you mean
    (x^3+\frac{1}{2x})^{12}
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    (Original post by steve2005)
    Do you mean
    (x^3+\frac{1}{2x})^{12}
    yes thats it, but how do you solve, it i know that you need to get it into the form (1+x)n but how do you do that with such arkward numbers
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    (Original post by dexter -1)
    Ok, what do you know?
    nCr familiar?
    Yes, i am But do you not need to get it into the form (1-ax)n ???
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    You don't need to get it in the form (1 + x)^n .

    Can you write down the first four terms in the expansion (a + b)^{12} ?

    If so, let a=x^3 and b=- \frac{1}{2x} .
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    have you tried to re write the the 1/2x?
 
 
 
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