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emgaimua2019
2 năm trước
Tìm m để đường thẳng delta: y=2(m-1)x-m-1, cắt (P): y=x^2 tại 2 điểm phân biệt A(x1;y1); B(x2;y2) thỏa mãn. a) P= x1^2+x2^2-2x1-2x2 đạt GTNN. b) giá trị tuyệt đối của căn x1- căn x2=1. c) x1^2+x2^2-y1-y2=1. d) x1<-2<x2 . e) căn x1<1<căn x2<2. giúp mình nhanh nhanh với ạ
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