二二阶行列式与逆矩阵,1.了解二阶行列式的定义.2.会用二阶行列式求逆矩阵.,1,2,1,2,1,2,1,2,1,2,1,2,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,反思当detA=ad-bc0时,二阶矩阵可逆;当detA=ad-bc=0时,二阶矩阵不可逆.,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,题型一,题型二,题型三,题型四,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,
