Question

For what value (s) of x will the points (1,_1),(2,1) and (4,x) lie on a line ?

Answer 1

Step-by-step explanation:

use this formula

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

substitute values as x1=1 ,x2=2 ,x3=4

y1=1 ,y2=1 ,y3=x

you will get answer as 1