Cho hàm số \(y = \dfrac{{ax + b}}{{cx + d}}\) có đ...
Câu hỏi: Cho hàm số \(y = \dfrac{{ax + b}}{{cx + d}}\) có đồ thị như hình vẽ bên. Khẳng định nào sau đây là khẳng định đúng?![](data:image/png;base64,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)
A \(\left\{ {\begin{array}{*{20}{c}}{ad < 0}\\{bc > 0}\end{array}} \right.\).
B \(\left\{ {\begin{array}{*{20}{c}}{ad < 0}\\{bc < 0}\end{array}} \right.\).
C \(\left\{ {\begin{array}{*{20}{c}}{ad > 0}\\{bc < 0}\end{array}} \right.\).
D \(\left\{ {\begin{array}{*{20}{c}}{ad > 0}\\{bc > 0}\end{array}} \right.\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi HK2 môn Toán lớp 12 THPT chuyên Nguyễn Huệ Hà Nội - Năm 2018 - 2019 (có lời giải chi tiết)