10,11,13,34,58,105,( )A.182 B.149 C.134 D.197
10,11,13,34,58,105,( )A.182 B.149 C.134 D.197
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
a,b ,c ,d
已知a,b,c,d 属于(符号)R 且b>0,-c/a < -d/b,则() A.bcad C.a/c >d/b D.a
一直a>b>c>d,则(1/(a-b)+1/(b-c)+1/(c-d))*(a-d)的最小值
( )-(c-d)=(a-c)-(-b+d)
t=MAX(a+b,c+d)*10
已知:(10a+b)(10c+d)=(10a+c)(10b+d)=1000a+100b+10c+d,求a.b.c.d.
已知:(10a+b)(10c+d)=(10a+c)(10b+d)=1000a+100b+10c+d,求a.b.c.d.(
a*b=c*d a+b=7 c+d=8 a+c=10 b+d=5 a=( ) b=( ) c=( ) d=( )
(a+b)(c-d)等于?