3,10,21,35,51,() A.59 B.66 C.68 D.72
3,10,21,35,51,() A.59 B.66 C.68 D.72
33.3,10,21,35,51,( ) A.59 B.66 C.68 D.72 34.1/4,2/5,5/7,1,17
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
a,b,c,d>0 证(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b
求齐次线性方程组 (1)A-8B+10C+2D=0 2A+4B+5C-D=0 3A+8B+6C-2D=0 (2) A+B
求齐次线性 (1)A-8B+10C+2D=0 2A+4B+5C-D=0 3A+8B+6C-2D=0 (2) A+B=5
[a,b)×[c,d
a,b ,c ,d
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
3、若有以下定义和语句:int a,b,c;scanf(“a=%d,b=%d,c=%d”,&a,&b,&c);为了使1,