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ClueBot NG (talk | contribs) m Reverting possible vandalism by 118.139.138.142 to version by Mark K. Jensen. Report False Positive? Thanks, ClueBot NG. (4407038) (Bot) |
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[[File:Développement limité du cosinus.svg|thumb|The [[cosine function]] and all of its [[Taylor polynomials]] are even functions.]]
In [[mathematics]], an '''even function''' is a [[real function]] such that <math>f(-x)=f(x)</math> for every <math>x</math> in its [[___domain of a function|___domain]]. Similarly, an '''odd function''' is a function such that <math>f(-x)=-f(x)</math> for every <math>x</math> in its ___domain
They are named for the [[parity (mathematics)|parity]] of the powers of the [[Power Function|power functions]] which satisfy each condition: the function <math>f(x) = x^n</math> is even if ''n'' is an [[even integer]], and it is odd if ''n'' is an odd integer.
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