Mathematics · Binomial Theorem

The middle term in the expansion of (x - 1x)2n for a positive integer 'n' is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1(2n + 1)!
2(2n)!
31 · 3 · 5 ... (2n - 1)n! 2n
41 · 3 · 5 ... (2n - 1)n! (-2)n✓

Correct answer

1 · 3 · 5 ... (2n - 1)n! (-2)n

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The middle term in the expansion of (x - 1x)2n for a positive integer 'n' is:

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