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Expansion of $$(a+x)^n$$
## Formula
$$(a+x)^n=\sum_{r=0}^{n}{}^nC_ra^{n-r}x^r$$
## Usage
- Used to directly identify the coefficient of any power of $$x$$.
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Expansion of $$(a+x)^n$$
## Formula
$$(a+x)^n=\sum_{r=0}^{n}{}^nC_ra^{n-r}x^r$$
## Usage
- Used to directly identify the coefficient of any power of $$x$$.
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