Hi oli4e, my mistake, I mean prove not solve. I gave full text of the exercise(in my translation :)).
I know for a zero solution, but it isn't the task. I think it is right HallsofIvy. It is a technical error.
Thanks for a help. Cheers...
I mean with this (I+A)^-1, inverse of the matrix (I + A).
You have understood correctly.
As I tried to solve the problem I came to the same answer.
Perhaps there is a technical error, but I'm not sure.
Thanks for answer.
A is a square matrix n*n with the following properties: A*A=A and A not equal I (identity matrix).
How to prove the following equation:
(I+A)^-1=I+A/2 ?