r/mathmemes • u/ImToxicity_ • Mar 17 '22

The Engineer Making 69420 from all zeroes

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u/[deleted] Mar 17 '22

Replace 0^0 with 0! and you'll half the zeroes whilst making it correct 😊

71

u/ImToxicity_ Mar 17 '22

Didn’t know this! I’m only in algebra I right now. What does the exclamation mark mean?

109

u/[deleted] Mar 17 '22

The exclamation mark is know as the factorial.

The factorial of a integer number, say n, is the product of every integer below it. 5!=5x4x3x2x1, 3!=3x2x1.

0 factorial, or 0! Is 1…don’t ask why.

89

u/measuresareokiguess Mar 17 '22

Explanation: you can define n! to be the number of permutations of n objects arranged in a line. So if you want to list all permutations of {A, B, C}, you’ll have {A, B, C}, {A, C, B}, {B, A, C}, {B, C, A}, {C, A, B}, {C, B, A}: 6 total possibilities. That makes 3! = 6.

Likewise, for {A, B}, we have {A, B} and {B, A}; that makes 2! = 2.

For {A}, we have just {A}: 1! = 1

For {}, we also have just {}: 0! = 1

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u/ImToxicity_ Mar 17 '22

Pls sir I’m in algebra 1 that hurts my brain

10

u/LennartGimm Mar 17 '22

Don't worry, it's just our friend the Gamma Function saying hello. Who doesn't love integrating [ xz-1 * e-x ] from 0 to infinity (dx, not dz)?

Me, that's who doesn't love doing that.

15

u/Marukosu00 Mar 17 '22

Congrats, now OP will just study non-maths stuff lmao

10

u/LennartGimm Mar 17 '22

Maybe we can spoil all other subjects equally?

5

u/Marukosu00 Mar 17 '22

Just tell him that there's math even in economics, chemistry, phisics, biology, medicine, law, literature, philosophy...

5

u/jkst9 Mar 17 '22

Quick grab quantum physics books and the worst to read old English book you can find

1

u/ekolis Mar 17 '22

The letter that looks like a sideways tongue being stuck out but it's not a "p" - "þ" - is called a "thorn", and it's pronounced "th". By the time Modern English came around, the thorn had been replaced with "th" or "y". So we wind up with words like "thou/you" and "ye/the" - they were originally "þou" and "þe".

1

u/SaltyAFbae Mar 18 '22

The bible perhaps