need help 1, a)) show that the distance between parallel planes Ax+By+Cz+D1=0 and Ax+By+Cz+D2=0 in 3spac

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Title: need help 1

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Posted On: Apr 08, 2011 09:00 AM

a)) show that the distance between parallel planes Ax+By+Cz+D1=0 and Ax+By+Cz+D2=0 in 3space is:

d=l D1 -D2 l/ $\sqrt{\ } \!\,$ A^2+B^2+C^2

b)) Use this result to find the distance between the parallel planes 3x-9y-12z+5=0 and x-3y-4z+6=0

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ilham rafie
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