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Binomial Theorem question

2019 · 12 Apr · Shift 1 · Q42
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  2. /JEE Main
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  5. /2019 · 12 Apr · Shift 1 · Q42

Binomial Theorem question

2019 · 12 Apr · Shift 1 · Q42

JEE MainMathematicsBinomial TheoremMCQ+4 / −1
The coefficient of x18 in the product (1 + x) (1 – x)10 (1 + x + x2)9 is :
  1. A
    126
  2. B
    - 84
  3. C
    - 126
  4. D
    84
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