Question

What is 1 / (0! - 1!)

Answer 1

The answer would be undefined since 0! is equal to 1 and 1! is also 1. When you subtract 1 and 1, you get 0 on the denominator, and 1/0 is undefined.

Answer 2

0! = 1  and 1! = 1  so the denominator = 0 

So the answer is 1 / (0! - 1! ) is indeterminate