By using Taylor's formula, the article deduces the sufficient condition of the existent extreme value and the necessary condition of the inexistent extreme value of trinary function. 通过利用泰勒公式推导出判断三元函数极值存在的充分条件和极值不存在的必要条件。
The ternary numeral system (also called base 3) has three as its base.
Analogous to a bit, a ternary digit is a trit (trinary digit). One trit is equivalent to log23 (about 1.58496) bits of information.
Although ternary most often refers to a system in which the three digits 0, 1, and 2 are all non-negative numbers, the adjective also lends its name to the balanced ternary system, used in comparison logic and ternary computers.