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Mathematics 25 Online
OpenStudy (anonymous):

What is 7P5?

OpenStudy (anonymous):

It is 2,520. Use your calculator.

OpenStudy (anonymous):

How do i find the answer?

OpenStudy (anonymous):

7 P 5 = 7!/2! = 5040/2 = 2,520 7! = 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5,040 2! = 2 x 1 = 2

OpenStudy (anonymous):

so then 6P6 = 1 ?

OpenStudy (anonymous):

In general, r P n = (r!)/(r-n)!

OpenStudy (anonymous):

6 P 6 = 6!

OpenStudy (anonymous):

n P n = n! Good to know that.

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