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Sum of Even-Powered Terms
## Formula
For:
$$(a+b)^n$$
the sum of terms containing even powers of $$b$$ is:
$$\frac{(a+b)^n+(a-b)^n}{2}$$
## Usage
- Used to obtain the complete sum of even-indexed terms without expanding the binomial.
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Sum of Even-Powered Terms
## Formula
For:
$$(a+b)^n$$
the sum of terms containing even powers of $$b$$ is:
$$\frac{(a+b)^n+(a-b)^n}{2}$$
## Usage
- Used to obtain the complete sum of even-indexed terms without expanding the binomial.
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