Hint :
If and are matrices, and use:
Fernando Revilla
Show that the product of two upper triangular matrices is upper triangular matrix.
I know this is true because in the lower part each term will be multiplied by 0 (so in the lower part each element will be 0(a)+0(b)...+0(z))
My question is how do you actually write this?
Hint :
If and are matrices, and use:
Fernando Revilla