Coefficient of x^ 2 in the expansion of ( x - 1 2 x )^ 1 is equal to :

Mathematics · JEE Main · NTA Exams — Binomial Theorem And Its Simple Applications

1. \(\frac{1}{7}\)
2. \(\frac{-1}{7}\)
3. \(-7\)
4. \(7\)

Answer

(C) -7

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