问答
c82排列组合怎么计算(c82怎么算)
2024-12-16
来源:互联网转载
1、建议还是用枚举法。
2、直接算过于复杂了:c(8 1) = 8/1 = 8c(8 2) = 8*7/(2*1) = 28c(8 3) = 8*7*6/(3*2*1) = 56c(8 4) = 8*7*6*5/(4*3*2*1) = 70c(8 5) = c(8 3) = 56.因此 n=4希望满意~~~。
TAG:c82
1、建议还是用枚举法。
2、直接算过于复杂了:c(8 1) = 8/1 = 8c(8 2) = 8*7/(2*1) = 28c(8 3) = 8*7*6/(3*2*1) = 56c(8 4) = 8*7*6*5/(4*3*2*1) = 70c(8 5) = c(8 3) = 56.因此 n=4希望满意~~~。
TAG:c82