In other words, T is invertible! Why are you doing that? I suggested you just go ahead and multiply. It is not important that powers of T can be row reduced to the identity. Any matrix whose determinant is not 0 can be row reduced to the identity matrix. If T can be row reduced to the identity matrix, then so can all of its powers. Remember when I said, "If all you have is a hammer, every problem looks like a nail"? If all you know is "row-reduction", you will apply that to every problem- whether it works or not!but after i made some legal operations on the original matrix T
i got the identity metrix (I)
there is nothing i can do with it
i get that for every value of N
both in the first and the second part
i get the desirable answer
i know that i am wrong in solving it that
what is the right way??