Mathematics, 16.08.2021 16:40 nathangirnet
Cho a, b,c thỏa mãn a+b-2c=0 và 2ab-bc-ca=0 chứng minh a=b=c
Answers: 1
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Cho a, b,c thỏa mãn a+b-2c=0 và 2ab-bc-ca=0 chứng minh a=b=c...
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