1.5 "Defined Points" ppt-Electric Courseware of Jiangsu Education Edition

The elective version of the Soviet version (2-2) 1.5 "Definite Integration" ppt calculus mainly solves two basic problems in geometry 1. How to determine the slope of the tangent at a point on the curve; 2. How to find the area of ​​the "curve trapezoid" below the curve . (1) Segmentation: insert n-1 points at equal intervals on the interval [a, b], and divide it into n cells: the width of each cell ⊿x

A footstool (foot stool, footrest, foot rest) is a piece of furniture or a support used to elevate the foot. There are two main types of footstool, which can be loosely categorized into those designed for comfort and those designed for function.

Designed for comfort: This type of footstool is used to provide comfort to a person seated, for example, in a chair or sofa. It is typically a short, wide, four-legged stool. The top is upholstered and padded in a fabric or animal hide, such as leather. This type of footstool is also a type of ottoman. It allows the seated person to rest their feet upon it, supporting the legs at a mostly horizontal level, thus giving rise to the alternate term footrest. High quality footstools are height–adjustable.

Designed for Function: This type of footstool supports a person's feet that do not reach the floor when seated. The footstool is placed under the feet of a sitting person so that the person's feet may rest comfortably on it.  It is also used to make the blood circulation of the body flow more freely when sitting down.

Foot RestsFoot Rests 2

Foot Rests

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