a(a+ d)(a+ 2d)=8 ,a+(a+d)+(a+2d)=-3
计算A+(A+D)+(A+2D)+.+(A+99D)
scanf("%d%d",&a,
(a-b+c-d)(a+b-c-d)=[(a-d)-______][(a-d)+______]
已知集合A=(a,a+d,a+2d)B=(a,aq,aq2)之中a,d,q∈R,若A=B,求a,d,q
已知a-b=-3,c+d=2则(a+c)-(a-d)的值为 ( )
a+b+c+d=2a;a+b+c+d=4b;a+b+c+d=6c;a+b+c+d=8d 求a,b,c,d
已知集合A={a,a+d,a+2d},B={a,aq,aq2},其中d不等于q,A=B,求d和q的值
已知集合A={a,a+d,a+2d},B={a,aq,a/q},若A=B,求d/a的值
已知:a/b=c/d,求证:(2a+3b)/(a+b)=(2c+3d)/(c+d)
已知a/b=c/d,求证2a+3b/a+b=2c+3d/c+d
实数a,b,c,d满足d>c;a+b=c+d;a+d
(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b+3c))>=2/3