a,b,c大于0,证明a/b+c+b/a+c+c/a+b大于等于3/2a,b,c大于0 ,a/(b+c)+b/(a+c)+c/(a+b)大于等于3/2

a,b,c大于0,证明a/b+c+b/a+c+c/a+b大于等于3/2a,b,c大于0 ,a/(b+c)+b/(a+c)+c/(a+b)大于等于3/2
a,b,c大于0,证明a/b+c+b/a+c+c/a+b大于等于3/2
a,b,c大于0 ,a/(b+c)+b/(a+c)+c/(a+b)大于等于3/2

a,b,c大于0,证明a/b+c+b/a+c+c/a+b大于等于3/2a,b,c大于0 ,a/(b+c)+b/(a+c)+c/(a+b)大于等于3/2
a/(b+c)=(a+b)/2(b+c)+(a+c)/2(b+c)-1/2
b/(a+c)=(a+b)/2(a+c)+(b+c)/2(a+c)-1/2
c/(a+b)=(c+a)/2(a+b)+(b+c)/2(a+b)-1/2
三个式子相加,就可以分组使用均值不等式.