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Câu hỏi: Trong không gian $Oxyz$, cho ba điểm : $A(-2;0;0),B(0;0;7),C(0;3;0)$. Phương trình mặt phẳng $(ABC)$ là
A. $\dfrac{x}{-2}+\dfrac{y}{7}+\dfrac{z}{3}=1$
B. $\dfrac{x}{-2}+\dfrac{y}{7}+\dfrac{z}{3}=0$
C. $\dfrac{x}{-2}+\dfrac{y}{3}+\dfrac{z}{7}=1$
D. $\dfrac{x}{-2}+\dfrac{y}{7}+\dfrac{z}{3}+1=0$
A. $\dfrac{x}{-2}+\dfrac{y}{7}+\dfrac{z}{3}=1$
B. $\dfrac{x}{-2}+\dfrac{y}{7}+\dfrac{z}{3}=0$
C. $\dfrac{x}{-2}+\dfrac{y}{3}+\dfrac{z}{7}=1$
D. $\dfrac{x}{-2}+\dfrac{y}{7}+\dfrac{z}{3}+1=0$
Phương trình mặt phẳng $(ABC)$ là : $\dfrac{x}{-2}+\dfrac{y}{3}+\dfrac{z}{7}=1$
Đáp án C.