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nguyenthimung123


cho toa do 2 diem A(x1,y1,z1), B (x2,y2,z2) va duong thang d co phuong trinh tham so. Lam the nao de xc dinh A, B cung phia hay khac phia voi d khi da biet AB va d dong phang
neu the toa do 2 dim vao thi sao the duoc vi phuong trinh duoc thang d la phuong trinh tham so hoac phuong trinh chinh ta , lam the nao de xet dau
neu the toa do 2 dim vao thi sao the duoc vi phuong trinh duoc thang d la phuong trinh tham so hoac phuong trinh chinh ta , lam the nao de xet dau