Question

three points A(2,3),B(2k,5),C(-3,6) lie on a straight line.find the values of k.

Answer 1

Just use the area of triangle formula.learnt in coordinate geometry. Since they are in same line the area will be 0. I can't type the formula here but if u substitute all of them in the formula and equate it to zero u will get the answer.. Hope it helps