8P8

解答

8 P 8

40320

求解步骤

= \frac{n !}{( n - r ) !}

代入

n = 8, r = 8

= \frac{8 !}{( 8 - 8 ) !}

\frac{8 !}{( 8 - 8 ) !} = 40320

= 40320

r an g e 1, 2, 3, 4, 5

s im pl i f y 2 π

20 c 2

r an g e 5, 9, 3, 9, 4, 5, 2, 6, 10, 2

s t d 98, 92, 92, 90, 86, 86, 84, 82, 82, 82, 82, 80, 80, 76, 74, 74, 72, 70, 66, 60, 52