Check sibling questions

Slide4.JPG

Slide5.JPG

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


Transcript

Question 2 Find a relation between x and y if the points (x, y), (1, 2) and (7, 0) are collinear. Let A(x, y), B (1, 2) and c (7, 0) be the 3 collinear Points If the above Points are collinear, they will lie on the same line, i.e. they will not form a triangle . So, Area of ∆ ABC = 0 1/2 [𝑥1(𝑦2 −𝑦3)+𝑥2 (𝑦3−𝑦1)+𝑥3(𝑦1 −𝑦2)] = 0 Here, x1 = x, y1 = y x2 = 1, y2 = 2 x3 = 7, y3 = 0 Putting the values 1/2 [𝑥(2 −0)+1 (0−𝑦)+7(𝑦 −2)] = 0 x (2) + 1 (−y) + 7 (y − 2) = 0 × 2 2x − y + 7y − 14 = 0 2x + 6y − 14 = 0 2(x + 3y − 7) = 0 x + 3y − 7 = 0 ∴ x + 3y − 7 = 0 is the required relation between x and y.

Ask a doubt
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.