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what is the expression 400!/398! equivalent to?

ultmage11234  Jan 31, 2015

Best Answer 

 #1
avatar+91450 
+5

399×400

because

398!=1×2×3...×398

and

400!=1×2×3....×398×399×400

So

all the other factors cancel out. :)

Melody  Feb 1, 2015
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1+0 Answers

 #1
avatar+91450 
+5
Best Answer

399×400

because

398!=1×2×3...×398

and

400!=1×2×3....×398×399×400

So

all the other factors cancel out. :)

Melody  Feb 1, 2015

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