Question

Em da quay tro lai voi nhung bai toan kho day. Mong moi nguoi giup nhe:

1/ Cho x,y >0 va x+y=2. CMR: x³y³(x³+y³) \(\le\)2

2/ Cho a,b,c>0 va a+b+c=1

CMR \(\frac{a^2}{b}+\frac{b^2}{c}+\frac{c^2}{a}\ge3\left(a^2+b^2+c^2\right)\)

3/ Cho a,b,c>0 va a+b+c=1

CMR 4(a³+b³+c³-3abc)\(\ge\)3(a-b)²

Xin chac chan rang de chep dung 100%

Answer 1

one piece

Answer 2

Em mong cac ban giup cau 2 thoi cung duoc a