+130518 0 / 0 is known as an "indeterminate" form.......we can't say WHAT it might be
That is not a valid operation. You can't divide by zero. Normally with zero in the numerator, the answer is zero, but equally normally, anything dividided by itself equals one. So 0/0 doesn't work.
If you take the function, y=x/x, and you plot the graph, it will look like a horizontal straight line going through y=1. So it looks like the answer must be 1. But to be correct, 0 is not in the domain of that function. Similarly to plotting the function y=1/x, again, is not in the domain.
0/0 just doesn't work.
