Mathematics · Binomial Theorem
The coefficient of xn in the expansion of (1 + x)(1 - x)n is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1(-1) n-1 (n - 1) 2
- 2(-1) n (1 - n)✓
- 3(-1) n-1 n
- 4(n - 1)
Correct answer
(-1) n (1 - n)
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