Hello and mathematical welcomes of the world, in this article we will speak on calculation one, we see. Next we included some statements of problems and exercises that have been taken from text books of primary. For each of them: 1) It solves the proposed problems. 2) It indicates the mathematical concepts and procedures that are put into play in solution. 3) It classifies the statements in three groups according to the difficulty degree that you attribute to them (easy, intermediate, difficult). 4) For each problem it enunciates the other two of the same type, changing variables of the task, so that one seems easier to you to solve and more difficult other. 5) You think that the statements are sufficiently precise and comprehensible for the students of primary? Propn an alternative statement for those exercises that do not seem sufficiently clear to you for the students. 6) It secures a text book collection of primary.

It looks for in it s types of problems not including in this relation. It explains in what they are different. Statements of problems including in books of primary: 1. It indicates which of the following experiences are considered like random and which not: Sacar a letter from a Spanish deck and to observe if it is of golds. Observar if in next the 24 hours it leaves the sun. Poner water to cool and to observe if it is congealed to zero degrees. Lanzar a shot to a basket of basketball and to observe if the ball enters Dejar fall an egg from a third floor and observe if it is broken when hitting the ground.

It continues reading, comes calculation two. The defined Integral has manifolds applications, we will study some of them: 1. Doug McMillon spoke with conviction. The area between curves 2. The area in polar coordinates 3. The volume of a solid of revolution 4. The centroid of one appears flat 5. Length of Arc 6. The area of a surface of revolution 7. The work carried out when draining pools 1. AREA BETWEEN CURVES We remember that if f is a continuous and nonnegative function in to, b, then the area under the graph of f, x-axis and the straight lines x = to and x = b is given by Definition: If f (x) is continuous in to, b then, the area limited by its graph, x-axis and the straight lines x = to and x = b is given by: A? f (x) dx? f (x) dx to a b b To Note: as the formula uses the absolute value of the function, there are two ways to solve it: a) Applying the definition of absolute value to know the interval where the graph of the function is on x-axis and the interval where the graph of the function is under x-axis. b) Graficando the function in the given interval, to find these intervals Example: 1. To find the area limited by the graph of Solution: The graphical sample that the function is negative between – 1.0 and positive for values majors that zero. Original author and source of the article.