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Approximation of Square Root
## Formula
For:
$$|x|\ll1$$
$$\sqrt{1+x}\approx1+\frac x2-\frac{x^2}{8}$$
For first-order approximation:
$$\sqrt{1+x}\approx1+\frac x2$$
## Usage
- Used for approximating square roots of numbers close to $1$.
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Approximation of Square Root
## Formula
For:
$$|x|\ll1$$
$$\sqrt{1+x}\approx1+\frac x2-\frac{x^2}{8}$$
For first-order approximation:
$$\sqrt{1+x}\approx1+\frac x2$$
## Usage
- Used for approximating square roots of numbers close to $1$.
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