Mathematics · Binomial Theorem
What is the value of the sum S given by S = ∑r=0n (−1)r nCrr+3Cr?
- 16(n + 1)(n + 2)(n + 3)✓
- 26n + 4
- 38n + 3
- 43n + 3
Correct answer
6(n + 1)(n + 2)(n + 3)
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