a/b=c/d=2/3,a=2b/3,c=2d/3 a+c/d+b=(2b/3+2d/3)/(d+b)=2/3
a/b=c/d=2/3,a+c/d+b=?
1个回答
相关问题
-
a,b,c,d>0 证(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b
-
(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b+3c))>=2/3
-
2a-b-3c+d=a-( )括号里应填 A -a-b-3c+d B -a-b+3c+d C -a+b+3c-d D -
-
a+b+c+d=8,且a+2c=3b,b+2d=3c,c+2a=3d,d+2b=3a,求a+2b
-
求行列式 |a+b+c+2d a b c,d b+c+d+2a b c,d a a+c+d+2b c,d a b a+b
-
已知a-b=3,c-d=2,求(a-b-c-d)[﹙b-a﹚+﹙b-a﹚﹙c-d﹚+﹙d-c﹚]
-
若a/b=c/d=2/5,则a+c/b+d= a-c/b-d= a+b/a-b= b+d+2/a+c+5= 2a+3b-
-
已知a/b=c/d,求证2a+3b/a+b=2c+3d/c+d
-
1.设A=a+b+c+d,B=a+b-c+d,C=a-b+c-d,D=a-b-c+d,ab(a^2+b^2)=cd(c^
-
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