Mathematics · Binomial Theorem
The sum ∑r=1n r · 2nCr is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
Share:
- 1n · 22n-1✓
- 222n-1
- 32n-1 + 1
- 42n-1 - 1
Correct answer
n · 22n-1
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