1+2+3+…+100=(1+100)*100/2=5050
1*2*3*…*100=30414093201713378043612608166064768844377641568960512000000000000
加和是5050,阶乘你就别算了。答案是 30414093201713378043612608166064768844377641568960512000000000000
1+2+3+4+5+...+100=(100+1)乘100/2=10100/2=5050
5050
198765432187654321
5050
333300