What is the factorial of 1, 2 SURPRISING answer: (1, 2) ( π), 2

Type 0. 5 in your calculator to see what the factorial of onehalf is. The result will be and the exact answer is the square root of pi divided by 2amazing How is this possible, when the factorial of a number n is defined as n and this definition only makes sense for whole numbers The calculator result is not an error, and in this video I explain how the factorial can be extended beyond the whole numbers for all real numbers by the gamma function. Once we extend the factori