给定的二阶矩阵(2*2)，求其逆矩阵 输入大输出一个大小为2*2的距阵，矩阵每一行相邻的的两个数字之间由一个空格隔开小为2*2的距 -Given second-order matrix (2* 2), find the inverse matrix of the input high output of a size of 2* 2 matrix, the matrix adjacent to each line between two numbers separated by a sp