Question

求经济数学两题答案,函数和矩阵第二题要求有具体步骤,谢谢大家~

Answer 1

第一题答过了第二题(I+A,E)=0 1 3 1 0 01 0 5 0 1 01 -2 0 0 0 1 r3+2r1-r20 1 3 1 0 01 0 5 0 1 00 0 1 2 -1 1 r1-3r3,r2-5r30 1 0 -5 3 -31 0 0 -10 6 -50 0 1 2 -1 1 r1r31...