Extend the cells at (e,1) into negative x.
Cell (1,1) is a mirror, what about cells to the right?
What additional information does this show?
What pattern does this show?
How about negative x in cells below (e,1)?
Extend the cells at (e,1) into negative x.
Cell (1,1) is a mirror, what about cells to the right?
What additional information does this show?
What pattern does this show?
How about negative x in cells below (e,1)?