day 2 examples u7w14
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TRANSCRIPT
Factorial Notation!
n! reads "n factorial"
5! =
8! =
n! = n(n - 1)(n - 2)(n - 3)...
How about 0! = 1
Likewise, n! = n(n - 1)! or 8! = 8 · 7!
is a natural number
Simplify without a calculator:
Show 5! + 4! = 6 · 4!
Show (k + 1)! + k! = (k + 2)k!
