a(a+ d)(a+ 2d)=8 ,a+(a+d)+(a+2d)=-3
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a(a+ d)(a+ 2d)=8 ,a+(a+d)+(a+2d)=-3
![a(a+ d)(a+ 2d)=8 ,a+(a+d)+(a+2d)=-3](/uploads/image/z/19106644-4-4.jpg?t=a%28a%2B+d%29%28a%2B+2d%29%3D8+%2Ca%2B%EF%BC%88a%2Bd%EF%BC%89%2B%EF%BC%88a%2B2d%EF%BC%89%3D-3)
a+(a+d)+(a+2d)=-3可以算出a=-1-d代入a(a+ d)(a+ 2d)=8可以算出a和d的数值
计算A+(A+D)+(A+2D)+.+(A+99D)
scanf("%d%d",&a,
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