Question

determine o valor de "m" para que os pontos A(2m + 1, 2) B(-6,-5) e C(0,1) sejam colineares.

Answer 1

$\left[\begin{array}{ccc}2m+1&2&1\\-6&-5&1\\0&1&1\end{array}\right] \\ 2m+1-12++10m+5+6\\ 12m-12+12=0\\ 12m=0\\ m= \frac{12}{0}\\ m=0\\\\ A(2m + 1, 2)\\ A(2(0) + 1, 2)\\ A(0+1,2)\\ A(1,2)$