1.

For what value of K do the points (-1,4),(-3,8) and (-K+1,3K) lie on a straight line .

Answer»

You can CHECK this by determinant method.. which I have SOLVED.. or u may consider the three points to b the coordinate of the triangle and find the area.. there after equate it with 0 as 3 collonear points will have area of 0 units



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