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单词 Extremum Test
释义

Extremum Test

Consider a function in 1-D. If has a relative extremum at , then either or isnot Differentiable at . Either the first or second Derivative tests may be used to locate relativeextrema of the first kind.


A Necessary condition for to have a Minimum (Maximum) at is


and


A Sufficient condition is and (). Let , , ...,, but . Then has a Relative Maximum at if is Odd and, and has a Relative Minimum at if is Odd and . There is aSaddle Point at if is Even.

See also Extremum, First Derivative Test, Relative Maximum, Relative Minimum,Saddle Point (Function), Second Derivative Test
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