The coefficient of x 7 in the expansion of (1 – x – x 2 + x 3 ) 6 is

Mathematics · JEE Advanced · NTA ExamsBinomial Theorem And Its Simple Applications

The coefficient of x7 in the expansion of (1 – xx2 + x3)6 is
  1. –144
  2. 132
  3. 144
  4. –132

Answer

(D) –132

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