Question

for what value of k are the points (1, 1), (3,k) and (-1, 4) collinear?

Answer 1

$delta = 0$

Answer 2

Answer:

Step-by-step explanation:

☆ Let the points

A(1,1)

B(3,k)

C(-1,4)

☆ First step:Find the distance between A and B.

☆ Second step find the distance between B and C.

☆ Third step find the distance between A and C.

☆ Use Distance formula to find AB,BC and AC.

☆ Collinear formula

AB+BC = AC

☆ Put the value of AB,BCand AC in collinear formula.

☆ By use of this formula you can get the value of k.

☆ Hope that this helps you ☆