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Sum of Binomial Coefficients
## Formula
$$\sum_{k=0}^{n}\binom nk=2^n$$
Also:
$$\sum_{k=0}^{n}(-1)^k\binom nk=0$$
for:
$$n\ge1$$
## Usage
- Used in summation problems involving binomial coefficients.
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Sum of Binomial Coefficients
## Formula
$$\sum_{k=0}^{n}\binom nk=2^n$$
Also:
$$\sum_{k=0}^{n}(-1)^k\binom nk=0$$
for:
$$n\ge1$$
## Usage
- Used in summation problems involving binomial coefficients.
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