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vithanhthudlls
2 năm trước
Cho 2 đa thức f(x) = x2 + ax + b và g(x) = x2 + cx +d Chứng Minh Rằng: Nếu có 2 giá trị x1, x2 của x ( x1 ≠ x2) sao cho f(x1)=g(x1) hay f(x2) = g(x2) thì ta luôn có a=c và b=d
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