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write the first three terms of the expansion of (a-b)^10

what are the last three terms of

  • math - ,

    Look up "Pascal's Triangle", you will find it very useful for these type of questions.

    If not then ....

    = a^10 + 10a^9(-b) + 10*9/2!a^8(-b)^2 +
    = a^10 - 10a^9b + 45a^8b^2 + ...

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