Let A,B be two matrices of same order such that AB=A and BA=B. Then (A+B)2020 equals(Here, I is the identity matrix of same order.)

Let A,B be two matrices of same order such that AB=A and BA=B. Then (A

1.	Let A,B be two matrices of same order such that AB=A and BA=B. Then (A+B)2020 equals(Here, I is the identity matrix of same order.)
Answer» Let $A, B$ be two matrices of same order such that $A B = A$ and $B A = B .$ Then $(A + B)^{2020}$ equals (Here, $I$ is the identity matrix of same order.)