bai`1:cho a,b,c la 3 so duong.thoa man:a+b+c>=3. chung minh rang
a^{2005}+ b^{2005}+ c^{2005} >=3
bài2: tinh tich phan:
:limits_{0}^{1}( :sqrt[3]{x}+ :frac{1}{ :sqrt{2x-1} } )dx
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