the coordinates of 3 points are a(-1, -6), b(3, -12) and c(k, 6). Find the value of k if a, b and c are collinear.

The value of is -9.

Step-by-step explanation:

If , and , then . By vectors sum, we find each vector below:

(1)

(2)

By substituting in the equation defined at the begining of this

(3)

The value of is:

(3a)

If we know that , then the value of is:

Then, the value of is -9.

. + λrh() e 1 1 2 4 4 4 4 4 3 4 4 4 4 4 + th−1(− s(x)2 dx ω + λrh−1() e 2 1 2 4 4

step-by-step explanation:

5

step-by-step explanation: