bomkute1996th
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[FONT=.VnTime]1.a+b+c[/FONT]≥abc.chung minh:a2+b2+c2≥abc
2.chung minh:1/a + 1/b- (√(a/b) - √(b/a))2 ≥ 2√2 voi a,b>0;a2+b2=1
3.a,b,c>0;abc≤1.chung minh:a/c + b/a + c/b≥a+b+c
2.chung minh:1/a + 1/b- (√(a/b) - √(b/a))2 ≥ 2√2 voi a,b>0;a2+b2=1
3.a,b,c>0;abc≤1.chung minh:a/c + b/a + c/b≥a+b+c