![]() A function may differ from the sum of its Taylor series, even if its Taylor series is convergent. If the Taylor series of a function is convergent, its sum is the limit of the infinite sequence of the Taylor polynomials. Taylor's theorem gives quantitative estimates on the error introduced by the use of such approximations. Taylor polynomials are approximations of a function, which become generally more accurate as n increases. The partial sum formed by the first n + 1 terms of a Taylor series is a polynomial of degree n that is called the nth Taylor polynomial of the function. A Taylor series is also called a Maclaurin series when 0 is the point where the derivatives are considered, after Colin Maclaurin, who made extensive use of this special case of Taylor series in the mid-18th century. Taylor series are named after Brook Taylor, who introduced them in 1715. For most common functions, the function and the sum of its Taylor series are equal near this point. ![]() In mathematics, the Taylor series or Taylor expansion of a function is an infinite sum of terms that are expressed in terms of the function's derivatives at a single point. ![]()
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