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    IB Math AASL
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    Counting & Binomials
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    Counting & Binomials

    Skill Checklist

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    Thumbnail for Pascal's Triangle and nCr

    Theoretical introduction to n​Cr​, or (nr​), and Pascal's triangle.

    Pascal's Triangle and nCr
    Thumbnail for Binomial Theorem

    Using nCr​ to expand binomials like (1+2x)7.

    Binomial Theorem (Plus Only)

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    IB: 4
    1

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    Expand (2x−3)4 in descending powers of x.

    [5]

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