Author Topic: A level pure maths p-3 cie vectors doubt  (Read 1415 times)

Offline donhassan

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A level pure maths p-3 cie vectors doubt
« on: March 11, 2012, 05:47:15 pm »
hello everyone please help me out in this question please


The planes p1 and p2 have equations X+Y-Z=0 AND 2X-4Y+Z+12=0 respectively.
1.) find the numbers p,q,r such that vector (p,q,r) is parallel to both p1 and p2
2.)hence find the equation of the plane through the point (3,8,2) which is perpendicular  to both p1 and p2


answer:1.)p=1 q=1 r=2
           2.)X+y+2z=15
guys pls explain me in lucid way

thanks
donhassan