3 points lie in a plane; P1=i+2j+3k, P2=-3i+5j+2k, P3=i+2j+k. Find the Cartesian equation of the plane

Take 2 vectors on the plane, originating from the same point, that aren't parallel: P1-->P2 = P2-P1 = -4i+3j-kP1-->P3 = P3-P1 = 0i+0k-2kOne can then find the cross product of these two vectors to determine a vector that is always perpendicular to the plane. (P1-->P2)x(P1-->P3) =i(3*-2 - -10) - j(-4-2 - -10) + k(-40 - 30) = -6i -8j +0k The general form of the plane can then be given by n⋅r=n⋅a where n is the normal to the plane, r is any point, and a is any point on the plane. Hence the general form of the plane can be given by(-6i-8j+0k)⋅r=(-6i-8j+0k)⋅(1i+2j+3k)=-61+-82+03=22This equation can be converted to cartesian form, so that-6x-8y+0z=22

Answered by Further Mathematics tutor

2549 Views

See similar Further Mathematics A Level tutors

Related Further Mathematics A Level answers

All answers ▸

Why am I learning about matrices? What are they?!


Integrate the function f(x) = x ln (x) over the interval [1,e].


You have three keys in your pocket which you extract in a random way to unlock a lock. Assume that exactly one key opens the door when you pick it out of your pocket. Find the expectation value of the number of times you need to pick out a key to unlock.


How do you show that the centre of a group is a subgroup


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences