a+(a+d)+(a+2d)+（a+3d）+...+(a+10d)

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/09/20 20:44:43

a+(a+d)+(a+2d)+（a+3d）+...+(a+10d)
求

原式=11a+(1+2+3+..+10)d
=11a+[(1+10)+(2+9)+..+(5+6)]d
=11a+(11*5)d
=11a+55d

计算A+(A+D)+(A+2D)+.+(A+99D) scanf("%d%d",&a, D/A D/P差别答案分别是D D A A 朋友们,A&D advisory是什么?“A＆D”? main() { int a,d; scanf("%d%d",&a,&d); if((a3000)||(a>30&&d> a,b,c,d>0 证(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b printf("%d%d%d%d%d%d\n",a,b,c,d,e,f); [a,b)×[c,d d be a better dd d a a,b ,c ,d