Mathematics, 27.09.2021 03:10 summer132

Cho a, b,c là ba số thực thỏa mãn a, b>0 và a+b+c=1. Chứng minh rằng a) (a+b)(a+c)=a+bc

b) $\sqrt{\frac{(a+b)(b+ca)}{c+ab}$ =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 rằng a) (a+b)*(a+c)=a+bc
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Cho a, b,c là ba số thực thỏa mãn a, b>0 và a+b+c=1. Chứng minh rằng a) (a+b)*(a+c)=a+bcb) =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 rằng a) (a+b)(a+c)=a+bc

b) $\sqrt{\frac{(a+b)(b+ca)}{c+ab}$ =a+b