counting principles...?

Question

7!...0! ....what the heck are they asking?

Answer 1

If you mean factorial of 7 and factorial of 0, let's see:

7! = 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5040

It's a convention that:

0! = 1 and also 1! = 1

But that's a math question...

Answer 2

Heheh... they're not shouting 7 and 0. ! represents a recursive function called factorial.

Factorial only works with positive integers. How factorial works is you take the integer given and multiply by every integer that comes before it.

For example... 7! will be 7x6x5x4x3x2x1 which equals 5040. All factorial work this way... like 12! = 12x11x10x9x8x7x6x5x4x3x2x1 = 479001600.

The only exception is zero. 0! is equal to one. That's right... 0! = 1. I can't really explain it without getting into taylor series, but just trust me that it's true.

Answer 3

That is a factorial. To get the factorial of a number (integers only) you multiply the number by every integer less than it until you get to 1.

3! = 3x2x1 = 6
4! = 4x3x2x1 = 24

7! = 7x6x5x4x3x2x1 = 5,040

and

0! = 1 (That's just the rule.)

Answer 4

i have no idea!