非线性方程是常见的一类方程，非线性方程（组）的理论远不如线性方程（组）成熟和有效，特别是非线性方程组解的存在唯一性还没有完全解决，判断其解的存在性和解的个数几乎没有可行的办法。本例能使读者熟练掌握Matlab中的非线性方程求解相关的函数。-Nonlinear equations is common for a class of equations, nonlinear equations (group) is far below the theoretical linear equations (Group) mature and effective, especially nonlinear equations existence and uniqueness of solution has not been fully resolved, determine the existence of solutions for the reconciliation of the number of almost no practical solution. In this example, readers can master in Matlab to solve nonlinear equations related function.