I need help! Not sure how to do this!

I’m not a 100 percent sure, but the “!” sign means the product of all consecutive numbers after it.

For example: 5! = 5x4x3x2x1 and 10! = 10x9x8x7x6x5x4x3x2x1.

Now 1000! is a huuuuuuge number and a calculator can’t handle it. There’s an easy way to complete this.

1000! = 1000x999x998x997x996……all the way up to x3x2x1.

And

999! = 999x998x997x996….all the way up to x3x2x1

So basically 1000! = 1000×999!. When dividing 1000! by 999! the two 999!s cancel each other out leaving you with 1000. So the answer is 1000

a llloooonnngg countdown

“!” is a symbol for factorial. It means that you multiply that number with every whole number smaller than it down to 1. For example your problem means:

(1000 * 999 * 998…) / (999 * 998 * 997…)

No calculator will be able to do this for you because the numbers get too big. Using some logic you can see that almost everything cancels out leaving you with 1000.

1000! = 1000 * 999!

1000!/999! = (1000 * 999!)/999! = 1000

1000 factorial divided by 999 factorial.

The exclamation mark means to take the factorial.

4! = 4 x 3 x 2 x 1 = 24

8! = 8 x 7 x 6 x 5 x 4 x.. etc.

There’s help with the question. I just didn’t give you the final answer though

Answer 6

IT’S UNDER 9000! >:O

Answer 7

Factorials: 5! = 5 * 4 * 3 * 2 * 1

Knowing this,

1000! = 1000 * 999!

1000!/999! = (1000 * 999!)/999! = 1000

Dunno

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