Trong không gian Oxyz, cho hai đường thẳn...
Câu hỏi: Trong không gian Oxyz, cho hai đường thẳng \(\Delta :\frac{x}{1} = \frac{y}{1} = \frac{{z - 1}}{1}\) và \(\Delta ':\frac{{x - 1}}{1} = \frac{y}{2} = \frac{z}{1}\). Xét điểm M thay đổi. Gọi a, b lần lượt là khoảng cách từ M đến Δ và Δ'. Biểu thức \({a^2} + 2{b^2}\) đạt giá trị nhỏ nhất khi và chỉ khi \(M \equiv {M_0}\left( {{x_0};{y_0};{z_0}} \right)\). Khi đó \({x_0} + {y_0}\) bằng![](data:image/png;base64,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)
A. 0
B. \(\frac{2}{3}\)
C. \(\frac{4}{3}\)
D. \(\sqrt 2 \)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG năm 2019 môn Toán Trường THPT Chuyên Quang Trung - Bình Phước lần 3