Question

check $A(3,-2,4)B(1,1,1)$ and $C(-1,4,-1)$ are collinear

Answer 1

$A\left(3,-2,4\right),B\left(1,1,1\right)\&C\left(-1,4,-1\right)$ finding the distance between $ab,bc,ac$

$ab=\sqrt{22},bc=\sqrt{17}$ as they are not equal

They are not collinear$.$