The formula of curvature center coordinate may be taken in the postgraduate entrance examination, but it has not been taken for ten years, but it has passed a big math problem of 1995, and the curvature center coordinate is low.

As long as it is on the outline, it is possible to take the exam, so it takes no time to remember a simple formula. If you pass the exam, you don't have to worry about preparing yourself.

The content of the mathematics examination for postgraduate entrance examination: advanced mathematics (calculus of functions, limit, continuity, unary function, vector algebra and spatial analytic geometry, calculus of multivariate functions, infinite series, ordinary differential equations), linear algebra (determinant, matrix, vector, linear equations, eigenvalues and eigenvectors of matrices, quadratic form), probability theory and mathematical statistics.

Mathematics II: Advanced Mathematics: Function, Limit, Continuity, Univariate Function Calculus, Multivariate Function Calculus, Ordinary Differential Equation, Linear Algebra: Determinant, Matrix, Vector, Linear Equations, Eigenvalues and Eigenvectors of Matrix, Quadratic Form.