# Problem solver algebra 2

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Problem solver algebra 2 can support pupils to understand the material and improve their grades. Answer: in a determinant, rows and columns have the same status, and the nature of a determinant always holds true for rows and columns If all the elements in a certain column of a determinant are multiplied by the same multiple, it is equal to multiplying this multiple by this column Multiply the elements of a certain column of a determinant by the same multiple and add them to the corresponding elements of another column. The determinant remains unchanged Answer: B [test point click] this question was examined in the second major question and the 14th minor question of the real question in April 2007. The main knowledge points examined are the conditions for homogeneous linear equations to have non-zero solutions. [key points] equations have non-zero solutions, so the coefficient determinant In linear algebra, determinants are related to the coefficients of equations and coefficient matrices. The system of equations is related to the augmented matrix, the rank of the augmented matrix, and the rank of the vector system.

The analysis of linear continuous time systems can be reduced to the process of establishing and solving linear differential equations. In the differential equations of the system, there are time functions representing the excitation and response and their linear combinations of time derivatives. The complexity of a system is often expressed by the order meter of the system, which is the order of the differential equation describing the system. If there is no transformation in the analysis process, the time variable of the involved function is t.

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