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) \(\le\)22/ Cho a,b,c>0 va a+b+c=1CMR \(\frac{a^2}{b}+\frac{b^2}{c}+\frac{c^2}{a}\ge3\left(a^2+b^2+c^2\right)\)3/ Cho a,b,c>0 va a+b+c=1CMR 4(a3+b3+c3-3abc)\(\ge\)3(a-b)2Xin chac chan rang de chep dung...
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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%
one piece
Em mong cac ban giup cau 2 thoi cung duoc a