总述:本次共解1题。其中
☆算术计算1题
〖1/1算式〗
作业:求算式 (C(4,1)*C(39,3)+C(4,1)*C(38,2)*0+C(4,3)*C(38,0)*0)/C(42,3) 的值.
题型:数学计算
解:
(C(4,1)*C(39,3)+C(4,1)*C(38,2)*0+C(4,3)*C(38,0)*0)/C(42,3)
=(4*C(39,3)+C(4,1)*C(38,2)*0+C(4,3)*C(38,0)*0)/C(42,3)
=(4*9139+C(4,1)*C(38,2)*0+C(4,3)*C(38,0)*0)/C(42,3)
=(4*9139+4*C(38,2)*0+C(4,3)*C(38,0)*0)/C(42,3)
=(4*9139+4*703*0+C(4,3)*C(38,0)*0)/C(42,3)
=(4*9139+4*703*0+4*C(38,0)*0)/C(42,3)
=(4*9139+4*703*0+4*1*0)/C(42,3)
=36556/C(42,3)
=36556/11480
=3.184321 答案:(C(4,1)*C(39,3)+C(4,1)*C(38,2)*0+C(4,3)*C(38,0)*0)/C(42,3)=3.184321你的问题在这里没有得到解决?请到 热门难题 里面看看吧!