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JEE Main 2019 · 12 April · Shift I

JEE Main 2019 Mathematics question on Binomial Theorem

The coefficient of x8x^8 in the product (1+x)11(1−x)10(1+x+x2)9(1+x)^{11}(1-x)^{10}(1+x+x^2)^9 is
  1. A.
    84
  2. B.
    -126
  3. C.
    -84
  4. D.
    126
Show answer

Correct option: A

[JEE Main 2019 · 12 April · Shift I]

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