(a+5d)²=(a+2d)(a+9d) a+3d=8
scanf("%d%d",&a,
计算A+(A+D)+(A+2D)+.+(A+99D)
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
(a-b+c-d)(a+b-c-d)=[(a-d)-______][(a-d)+______]
设a,b,c,d为正数,求证(a+c/a+b)+(b+d/b+c)+(c+a/c+d)+(d+b/d+a)≥4
已知a、b、c、d满足方程组3a+b+c+d=1a+3b+c+d=9a+b+3c+d=9a+b+c+3d=5
若a-b=2,b-c=-3,c-d=5,则(a-c)(b-d)÷(a-d)= ___ .
若a-b=-3,c+d=2,则(b+c)-(a-d)的值( ) a.-1 b.-5 c.5 d.1
若a-b=-3,c-d=2,则(b+c)-(a-d)的值( ) a.-1 b.-5 c.5 d.1
:已知集合A={a,a+d,a+2d},B={a,aq,aq²}a为常数,若A=B,求d,q的值
D/A D/P差别
已知a-b=-3,c+d=2则(a+c)-(a-d)的值为 ( )