Question

o valor do M para que os pontos (2m+ 1,2),B(-6-5) e C(0,1) sejam colineares e?

Answer 1

$A= \left[\begin{array}{ccc}2m+1&2&1\\-6&-5&1\\0&1&1\end{array}\right] \\ determinate =0\\ DetA=-5(2m+1)-6-(2m+1-12) =0\\ -10m-5-6-2m+11=0\\ -12m+0=0\\ m=0$