Exclude Left End Point 排除左侧结束点
The derivative limit theorem may draw out the left (right) derivative limit theorem and about the region end point.
导数极限定理可以引出左(右)导数极限定理、区间端点导数极限定理。
The left end represents now, and the right end represents a point in the future.
左端代表着现在,右边代表着未来的某个时刻。
You look at the track field athletes, such as a rabbit-like Jiao left the starting point, such as Li Jian as towards the end, attracted the presence of the audience excited.
你看那径赛场上的运动员,一个个如矫兔般飞离起点,像利箭般冲向终点,引得在场的观众兴奋不已。
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