Question

Why is 0!=1?

Answer 1

well, make a case for 0! = 7 or 0! = 24 or.....

a load of this stuff is just our all agreeing upon definitions, as in the rules of the game. it's like the move from Real Numbers to Complex Numbers; and we import as much as we can.

So, absent the history of math, what does n ! mean ?!

Answer 2

\[ n!=n(n-1)...2·1. \]

Answer 3

sure :)

Answer 4

so set n = 0

Answer 5

or, actually, within your example, set n = 2: it is guaranteed to look silly

Answer 6

\[2!=2\cdot1\]

Answer 7

copying your example:

\(n!=n(n-1)...2·1.\)

\(2!=2(2-1)...2·1. = ??\)

Nah :(

Answer 8

Write it out properly, to start with

Answer 9

Thing is, the symbol is a definition. These symbols have no real historical pedigree.

How old is the equal sign?

Who invented it?

Answer 10

Oh

Answer 11

see this: brilliant !!

https://questioncove.com/study#/updates/5a233a2558229c86e96b9800

Answer 12

Richard Recorde, I think, is the answer

Answer 13

Oooops:

Robert Recorde

Answer 14

Thank you!

Answer 15

TU!!!

Answer 16

What does "TU" mean? x'D

Answer 17

it means LOL ....

Answer 18

sorta

Answer 19

why does 2^0 = 1?

Answer 20

: )

Answer 21

same reason :)

Answer 22

\(\color{#0cbb34}{\text{Originally Posted by}}\) @dude
Why is 0!=1?
\(\color{#0cbb34}{\text{End of Quote}}\)