Take pictures of math problems

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The Best Take pictures of math problems

Take pictures of math problems can help students to understand the material and improve their grades. Homework correction is a way of communication and interaction between teachers and students, and it is a routine work of teachers. Therefore, we believe that the skillful use of comment and evaluation in the correction of math homework can enable students to better understand the advantages and disadvantages of their homework, strengthen the communication between teachers and students, and promote students' progress in all aspects. Holiday (weekend) homework: weekend homework can also be said to be holiday homework. When designing homework, it is mainly practical and comprehensive. According to the teaching content and the experience of students in mathematical activities, we should design some exploratory homework that allows students to actively explore, experiment, think and cooperate.

Considering the numerical solution of two-dimensional elliptic partial differential equations, the finite difference method is used to solve them. Briefly, the difference expression of the second derivative is expressed by the five point difference scheme, and the above partial differential equation is discretized into a difference equation: Considering the numerical solution of one-dimensional heat conduction partial differential equation, the finite difference method is used to solve it. In brief, the three-point difference scheme of upwind method is adopted, and the difference expression of the second derivative is: Considering the numerical solution of two-dimensional wave partial differential equation, the finite difference method is used to solve it. Briefly, the three-point difference scheme of the upwind method is adopted to discretize the above partial differential equation into a difference equation: Elliptic partial differential describes the equilibrium state that does not change with time, and there is no initial condition, so it can not be solved recursively along the time step. The difference equation of the above formula can be solved by the matrix inversion method, but when h is small, there are many grids, and the memory and calculation of matrix inversion are very large.

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We learned the problem of chicken and rabbit in the same cage when we were in primary school. At that time, we used the magic method of let the rabbit lift its legs to get the answer to the problem. When we were in junior high school, we learned the solution of the system of binary first-order equations, which can solve this problem more conveniently. At the same time, we have also learned the solution of the quadratic equation of one variable, but our path of algebraic equations has ended here.

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