设矩阵A和B满足关系式AB=A+2B,其中,求矩阵B。
,求矩阵B。
AB=A+2B⇒AB-2B=A⇒(A-2E)B=A,两边同时左乘可得。其中,,|A-2E|=-1,。矩阵的乘法运算:
Complete the following sentence with a (compound) word derived from the one(s) given in bracket. Write your word on the ANSWER SHEET.
( ) is a strong feeling of love for and pride in one's own country. (national)