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31 December, 23:20

Which statement about the binomial expansion of (x2 - x) 9 is true?

The first term is - x18.

The second term is 9x17.

The third term is 36x14.

The last term is - x9.

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Answers (2)
  1. 1 January, 00:50
    0
    The answer is the last term is - x9

    proof

    (x2 - x) 9 = x18 - 9x17 + 36x16 - 84x15 + 126x14 - 126x13 + 84x12 - 36x11 + 9x10 - x9
  2. 1 January, 03:17
    0
    D. the last term is - x9 is the correct answer
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