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Sum of Terms Equidistant from Ends
## Formula
For:
$$(1+x)^n$$
the coefficients of terms equidistant from the beginning and end are equal:
$${}^nC_r={}^nC_{n-r}$$
## Usage
- Used to exploit symmetry in binomial expansions.
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Sum of Terms Equidistant from Ends
## Formula
For:
$$(1+x)^n$$
the coefficients of terms equidistant from the beginning and end are equal:
$${}^nC_r={}^nC_{n-r}$$
## Usage
- Used to exploit symmetry in binomial expansions.
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