Q
quangdaono1


cm bdt voi moi a,b,c:
[FONT=.VnTime](a+b)2 (b+c)2 [/FONT]≥[FONT=.VnTime] 4abc(a+b+c)[/FONT]
[FONT=.VnTime][/FONT]
[FONT=.VnTime](a+b)2 (b+c)2 [/FONT]≥[FONT=.VnTime] 4abc(a+b+c)[/FONT]
[FONT=.VnTime][/FONT]