c/m: $8/81(a^3+b^3+c^3)((1/a+1/(b+c))^3+(1/b+1/(a+c))^3(1/c+1/(b+a))^3)>=(a^2+bc)/(ab+ac)+(b^2+ac)/(cb+ab)+(c^2+ba)/(cb+ac)>=3$cho a,b,c>0.c/m: $8/81(a^3+b^3+c^3)((1/a+1/(b+c))^3+(1/b+1/(a+c))^3(1/c+1/(b+a))^3)>=(a^2+bc)/(ab+ac)+(b^2+ac)/(cb+ab)+(c^2+ba)/(cb+ac)>=3$
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help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!cho a,b,c>0.c/m: $8/81(a^3+b^3+c^3)((1/a+1/(b+c))^3+(1/b+1/(a+c))^3(1/c+1/(b+a))^3)>=(a^2+bc)/(ab+ac)+(b^2+ac)/(cb+ab)+(c^2+ba)/(cb+ac)>=3$
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c/m: $8/81(a^3+b^3+c^3)((1/a+1/(b+c))^3+(1/b+1/(a+c))^3(1/c+1/(b+a))^3)>=(a^2+bc)/(ab+ac)+(b^2+ac)/(cb+ab)+(c^2+ba)/(cb+ac)>=3$cho a,b,c>0.c/m: $8/81(a^3+b^3+c^3)((1/a+1/(b+c))^3+(1/b+1/(a+c))^3(1/c+1/(b+a))^3)>=(a^2+bc)/(ab+ac)+(b^2+ac)/(cb+ab)+(c^2+ba)/(cb+ac)>=3$
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