If you meant simple factorial as in "5!" then see answers above, if you meant equations like "(x! – x) / x = 23" then see below: You can’t mathematically solve it. You can only brute force the answer. Or apply some mathematical method like half division method:Let’s say we know that the answer is between zero and seven, then we can compute average between 7 and 0 and round it half-down – 3. Now we just inline this value in place of our x and get 1 as result which is definitely less than 23.
If you meant simple factorial as in "5!" then see answers above, if you meant equations like "(x! – x) / x = 23" then see below: You can’t mathematically solve it. You can only brute force the answer. Or apply some mathematical method like half division method:Let’s say we know that the answer is between zero and seven, then we can compute average between 7 and 0 and round it half-down – 3. Now we just inline this value in place of our x and get 1 as result which is definitely less than 23.
I’d guess Thai…