a3+b3+c3+3×abc>2(a+b)c2A,B,C都大于0且不相等且A+B>C求证!现场等!谢谢! 谢谢哥哥姐姐出手相助!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

来源:学生作业帮助网 编辑:作业帮 时间:2024/12/01 08:24:12
a3+b3+c3+3×abc>2(a+b)c2A,B,C都大于0且不相等且A+B>C求证!现场等!谢谢! 谢谢哥哥姐姐出手相助!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
x)K4N2N66><=1)H#Q;I3QIeާK?gdǔ';z|m'dlcӋ4>t. b" 2 ԾYg7А]+*$=X 0~HO/$Ayn_BB݋.lx{)nkgm eeelkjV W[#- Cm#M-8# gVs_.|:`H2ɮ6$ӵF

a3+b3+c3+3×abc>2(a+b)c2A,B,C都大于0且不相等且A+B>C求证!现场等!谢谢! 谢谢哥哥姐姐出手相助!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
a3+b3+c3+3×abc>2(a+b)c2
A,B,C都大于0且不相等且A+B>C
求证!现场等!谢谢! 谢谢哥哥姐姐出手相助!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

a3+b3+c3+3×abc>2(a+b)c2A,B,C都大于0且不相等且A+B>C求证!现场等!谢谢! 谢谢哥哥姐姐出手相助!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
求证?

设a=1 b=2 c=3代入
所以
a3+b3+c3+3×abc=1^3+2^3+3^3+3*1*2*3=54
2(a+b)c2=2*(1+2)*3^2=54
a3+b3+c3+3×abc>2(a+b)c2
不成立
题目出错了