此不等式有误:令a=b=c=d=1时,不成立.
证明:(a^3+b^3+c^3)/(a+b+c)+(b^3+c^3+d^3)/(b+c+d)+(c^3+d^3+a^3)
1个回答
相关问题
-
(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 -
-
解方程组:3a+b+c+d=0 a+3b+c+d=12 a+b+3c+d=12 a+b+c+3d=8
-
已知a,b,c,d满足a≤b,c≤d,a+b=c+d≠0及a^3+b^3=c^3+d^3,求证:a=c,b=d.(要完整
-
(A+B+C) ÷3+D=26 (A+B+D) ÷3+C=34 (A+C+D) ÷3+B=36 (D+B+C) ÷3+A
-
a,b,c,d>0 证(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b
-
a+b+c+d=8,且a+2c=3b,b+2d=3c,c+2a=3d,d+2b=3a,求a+2b
-
已知a,b,c,d满足a+b=c+d,a^3b^3c^3d^3求证:a^2009+b^2009=c^2009+d^200
-
已知a+b+c+d=0,a^3+b^3+c^3+d^3=3 (1)求证;(a+b)^3+(c+d)^3=0 (2)求证:
-
已知a/b=c/d,求证:(3a+2c)/(3a-2c)=(3b+2d)/(3b-2d)