Question

A =(7, 2),B =(5, 1) and c=(3, k) are in collinear. Find the value of k. Don't spam. If u spam I will report your answer. ​

Answer 1

Sure I will answer it for you mate

If area of Triangle is zero then they are collinear

1/2(x1(y2-y3)+x2(y3-y1)+x3(y1-y2)=0

1/2(7(1-k))+5(K-2)+3(2-1)=0

1/2(7-7k)+(5k-10)+3(1)=0

1/2(7-7k+5k-50+3)=0

1/2(-2k-40)=0

K =-20

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