Mathematics, 27.09.2021 20:40 tadvet1633

Cho a, b,c là ba số thực thỏa mãn a, b>0 và a+b+c=1. Chứng minh rằnga) (a+b)*(a+c)=a+bcb) √(a+b)(b+ca)/c+ab=a+b

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Cho a, b,c là ba số thực thỏa mãn a, b>0 và a+b+c=1. Chứng minh rằnga) (a+b)*(a+c)=a+bcb) √(a+b)(...

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