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Taylor Series

Taylor Series

A special case of a power series where the coefficients are specifically derived from the function's derivatives at a particular point.

A representation of a function as an infinite sum of terms that are calculated from the values of the function's derivatives at a single point.

The Taylor series of a function f(x)f(x) about a point x=ax = a is given by:

f(x)=f(a)+f(a)(xa)+f(a)2!(xa)2+f(a)3!(xa)3+...=n=0f(n)(a)n!(xa)nf(x) = f(a) + f'(a)(x - a) + \frac{f''(a)}{2!}(x - a)^2 + \frac{f'''(a)}{3!}(x - a)^3 + ... = \sum_{n=0}^{\infty} \frac{f^{(n)}(a)}{n!}(x - a)^n

Where f(n)(a)f^{(n)}(a) is the nn-th derivative of f(x)f(x) evaluated at x=ax = a. The higher the order of the derivative, the more accurate the approximation of the function around the point x=ax = a.

Maclaurin series when the point of consideration is x=0x = 0.