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Toán Lớp 9: cho abc=1, a+b+c>0. C/m: 1/a(1+b) + 1/b(1+c) + 1/c(1+a) ≥3/2 giúp mik với ạ

Home/ Toán Lớp 9: cho abc=1, a+b+c>0. C/m: 1/a(1+b) + 1/b(1+c) + 1/c(1+a) ≥3/2 giúp mik với ạ

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