线性代数提高线性方程组线性代数做题本（一）解答版选择题查看解析已掌握收入错题本题讨论不看本题#8518设 y=f(x)y = f\left(x\right)y=f(x) 是连续函数,点 Pi(xi,yi)(i=1,2,3){P}_{i}\left({{x}_{i},{y}_{i}}\right) \left({\mathrm{i} = 1,2,3}\right)Pi(xi,yi)(i=1,2,3) 为曲线 y=f(x)y = f\left(x\right)y=f(x) 上三个不同点,矩阵 A=A =A=(x1y11x2y21x3y31)\left(\begin{array}{lll} {x}_{1} & {y}_{1} & 1 \\ {x}_{2} & {y}_{2} & 1 \\ {x}_{3} & {y}_{3} & 1 \end{array}\right)x1x2x3y1y2y3111,则 ‾\underline{\qquad}.A. r(A)=1r\left(A\right) = 1r(A)=1B. r(A)=3r\left(A\right) = 3r(A)=3C. r(A)=2r\left(A\right) = 2r(A)=2 或 r(A)=3r\left(A\right) = 3r(A)=3D. r(A)=1r\left(A\right) = 1r(A)=1 或 r(A)=2r\left(A\right) = 2r(A)=2
