Question

find k if the points are collinear (k,1) (1,-1) and (11,4)​

Answer 1

Answer: k=5

Step-by-step explanation:

For k to be zero:-

Area of the triangle formed by the given points=0

1/2[x₁(y₂-y₃)+x₂(y₃-y₁)+x₃(y₁-y₂)]=0

k(-1-4)+1(4-1)+11(1+1)=0

5k=3+22

k=25/5=5(Ans)

Mark brainliest..............

Value of k= 5