multiplicative factor involved in some term of a polynomial, a series, or an expression From Wikipedia, the free encyclopedia

In mathematics, a **coefficient** is a constant multiplicative factor of a certain object. For example, the coefficient in *9x*^{2} is *9*. A coefficient can also be a variable such as , and .^{[1]}^{[2]}

The English Wiktionary has a dictionary definition (meanings of a word) for: **coefficient**

The object can be such things as a variable, a vector, a function, etc. In some cases, the objects and the coefficients are indexed similarly, leading to expressions such as:

where *a*_{n} is the coefficient of the variable *x*_{n} for each *n* = 1, 2, 3, …^{[3]}

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